# Who will be Trump's next Secretary of Defense?

Next Secretary of Defense

Updated: April 29, 2026

Category: Politics

Tags: Trump

HTML: /markets/politics/trump/who-will-be-trump-s-next-secretary-of-defense/

## Short Answer

**Key takeaway.** The **model** sees potential mispricing for 'No other person' (**28.6%** **model** vs **52.0%** **market**) as Trump's next Secretary of Defense, suggesting a different individual is more likely to be appointed.

## Key Claims (January 2026)

**- Christopher C.** Miller is favored, a "loyalist reformer" and former Acting Secretary.
   Keith Kellogg is a trusted national security ally with continued Trump access.
   Trump's transition team prioritizes "loyalist reformers" over traditional defense hawks.
   Tom Cotton is explicitly disfavored by the transition team's ideological preference.
*   Other candidates show policy alignment but lack current direct engagement with Trump.

### Why This Matters (GEO)

- AI agents extract claims, not arguments.
- Improves citation probability in summaries and answer cards.
- Enables fact stitching across multiple sources.

## Executive Verdict

**Key takeaway.** **Model** sees **3.5%** **probability** vs 4c **market** price, implying slight overvaluation given Hegseth's lack of current momentum.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| No other person | 52.0% | 28.6% | No single alternative candidate has emerged as a strong, widely favored contender at this time. |
| Ron DeSantis | 16.0% | 11.1% | Ron DeSantis is a prominent Republican, but has not been strongly linked to the SecDef role. |
| Dan Driscoll | 47.0% | 27.8% | Dan Driscoll's specific qualifications or links to the role are not widely reported. |

## Model vs Market

| Outcome | Market Probability | Octagon Model Probability |
| --- | --- | --- |
| No other person | 52.0% | 28.6% |
| Ron DeSantis | 16.0% | 11.1% |
| Dan Driscoll | 47.0% | 27.8% |
| Tom Cotton | 2.9% | 1.2% |
| Elbridge Colby | 0.1% | 0.1% |
| Mike Waltz | 0.9% | 0.7% |
| Joni Ernst | 5.6% | 3.6% |
| Steve Feinberg | 9.0% | 6.6% |
| Wesley Hunt | 4.9% | 3.7% |
| Tulsi Gabbard | 0.9% | 0.7% |
| Mike Rogers | 2.9% | 2.3% |
| Mike Pompeo | 4.7% | 3.6% |
| Keith Kellogg | 3.9% | 3.5% |
| Trae Stephens | 2.0% | 1.5% |
| Bill Hagerty | 2.0% | 1.5% |
| Mike Gallagher | 2.0% | 1.5% |
| Christopher Miller | 2.0% | 2.1% |

- Expiration: January 20, 2029

## Market Behavior & Price Dynamics

This market's price action has been entirely static, exhibiting a completely sideways trend since its inception. The perceived probability for this outcome has remained unchanged at its initial offering price of 3.9% across all recorded data points. The chart shows no significant price movements, spikes, or drops, resulting in a flat line with a price range of zero.

The complete lack of price fluctuation is a direct result of zero trading activity. With a total volume of zero contracts traded, there has been no buying or selling pressure to influence the price in either direction. As there have been no price movements, there is no market activity to correlate with any external events or news. This absence of trading indicates an extremely illiquid market and a lack of trader engagement or conviction at the current price.

The chart suggests that the market is currently dormant. The 3.9% price merely represents an initial offering rather than a reflection of active, collective sentiment or speculation. Consequently, no meaningful support or resistance levels have been established. The primary takeaway from the chart is the complete lack of market participation.

## Contract Snapshot

The Kalshi market "No other person" resolves to "Yes" if Donald Trump appoints a new Secretary of Defense before January 20, 2029, and that individual is neither Dan Driscoll nor Ron DeSantis. Conversely, it resolves to "No" if either Dan Driscoll or Ron DeSantis is appointed, or if no new Secretary of Defense is appointed by the deadline. Acting and interim positions do not count, and the market closes early upon the event's occurrence, or by January 20, 2029, at 10:00 am EST.

## Market Discussion

The main viewpoint among traders revolves around the market's premise, with participants arguing that the position of "Secretary of Defense" no longer exists and has been replaced by "Secretary of War." There are no specific arguments presented for or against any candidate's appointment, or for the "No other person" outcome. The notable insight is this apparent confusion among some participants regarding the official title of the cabinet position, leading them to suggest the market should be void.

## Market Data

| Contract | Yes Bid | Yes Ask | Last Price | Volume | Open Interest |
| --- | --- | --- | --- | --- | --- |
| Bill Hagerty | 0.1% | 2% | 2% | $26 | $14 |
| Christopher Miller | 0.1% | 2% | 2% | $25 | $14 |
| Dan Driscoll | 6% | 9% | 47% | $1,654.59 | $1,654.59 |
| Elbridge Colby | 0% | 0.1% | 0.1% | $1,223 | $973 |
| Joni Ernst | 5% | 10% | 5.6% | $891.3 | $797.3 |
| Keith Kellogg | 0.1% | 4.5% | 3.9% | $64 | $64 |
| Mike Gallagher | 0.1% | 2% | 2% | $26 | $14 |
| Mike Pompeo | 0.1% | 4.5% | 4.7% | $170 | $170 |
| Mike Rogers | 0.1% | 2.9% | 2.9% | $175.37 | $175.37 |
| Mike Waltz | 0.1% | 0.9% | 0.9% | $978 | $737 |
| No other person | 47% | 49% | 52% | $13,206.28 | $8,731.24 |
| Ron DeSantis | 11% | 15% | 16% | $3,129.88 | $1,634.74 |
| Steve Feinberg | 1.9% | 4% | 9% | $883 | $841 |
| Tom Cotton | 1% | 2.9% | 2.9% | $1,530 | $1,477 |
| Tulsi Gabbard | 0.1% | 0.9% | 0.9% | $419 | $419 |
| Trae Stephens | 0.1% | 2% | 2% | $26 | $14 |
| Wesley Hunt | 1% | 4% | 4.9% | $766 | $706 |

## Who Gains Most Face-Time in Trump National Security Briefings?

Key Ally Engagement | Lt. Gen. Keith Kellogg remains an active ally in Trump's national security discussions [[^]](https://en.wikipedia.org/wiki/Keith_Kellogg). |
Approved Foreign Trip | Kellogg's March 2024 Israel visit with Trump allies was explicitly approved by Donald Trump [[^]](https://www.cnn.com/2024/03/07/politics/trump-allies-israel-visit/index.html). |
Other Candidate Details | Insider reporting on private face-time for Mike Waltz and others is not extensively detailed [[^]](https://www.snopes.com/fact-check/trump-national-security-briefings/). |

**Retired Lt**

Retired Lt. Gen. Keith Kellogg continues to be a prominent figure in Donald Trump's national security discussions. Kellogg, who previously served as Acting National Security Advisor, remains a key ally and actively participates in foreign policy discussions approved by the former president [[^]](https://en.wikipedia.org/wiki/Keith_Kellogg). His ongoing engagement was highlighted by a sanctioned March 2024 visit to Israel alongside other Trump allies, underscoring his sustained relevance within Trump's national security circle [[^]](https://www.cnn.com/2024/03/07/politics/trump-allies-israel-visit/index.html).

Specific details on private face-time for other candidates are scarce in available reporting. While Donald Trump has reportedly offered access to "national security briefings" to campaign donors, detailed insider campaign reporting on which potential Secretary of Defense candidates, such as Mike Waltz, are currently gaining the most private face-time or mentions in briefings at Mar-a-Lago or Bedminster is not extensively detailed [[^]](https://www.snopes.com/fact-check/trump-national-security-briefings/). The available information primarily emphasizes Kellogg's specific and approved interactions, contrasting with a general lack of similar explicit details for other candidates [[^]](https://www.cnn.com/2024/03/07/politics/trump-allies-israel-visit/index.html).

## How Do Senators Ernst and Cotton Align With Project 2025 Defense Goals?

Sen. Joni Ernst Alignment | Supports religious liberty protections and halting military vaccine requirement; notes Army 20,000 short on recruiting goals [[^]](https://www.ernst.senate.gov/news/press-releases/ernst-supports-religious-liberty-protections-halting-military-vaccine-requirement-as-army-falls-20000-short-of-recruiting-goals) |
Sen. Tom Cotton Alignment | Advocates strong military, criticizes "wokeness," supports readiness policies [[^]](https://static.project2025.org/2025_MandateForLeadership_SECTION-02.pdf) |
Project 2025 Defense Focus | Reasserts presidential control over DoD, reforms military culture, prioritizes combat readiness and recruitment [[^]](https://static.project2025.org/2025_MandateForLeadership_SECTION-02.pdf) |

**Senators Joni Ernst and Tom Cotton demonstrate strong alignment with Project 2025 defense recommendations**

Senators Joni Ernst and Tom Cotton demonstrate strong alignment with Project 2025 defense recommendations. The Heritage Foundation's Project 2025 "Mandate for Leadership" defense chapter emphasizes reasserting presidential control over the Department of Defense and reforming military culture by removing "woke" policies like Diversity, Equity, and Inclusion initiatives [[^]](https://static.project2025.org/2025_MandateForLeadership_SECTION-02.pdf). It also calls for prioritizing combat readiness and recruitment, a return to a "warfighting culture," addressing declining recruitment, and ensuring religious freedom for service members [[^]](https://static.project2025.org/2025_MandateForLeadership_SECTION-02.pdf).

Senator Ernst's public statements reflect key Project 2025 concerns. Her positions include supporting "religious liberty protections" and "halting military vaccine requirement," while also noting the Army's significant recruitment shortfall [[^]](https://www.ernst.senate.gov/news/press-releases/ernst-supports-religious-liberty-protections-halting-military-vaccine-requirement-as-army-falls-20000-short-of-recruiting-goals). These stances directly mirror the "Mandate for Leadership's" focus on recruitment challenges and religious freedom within the armed forces [[^]](https://static.project2025.org/2025_MandateForLeadership_SECTION-02.pdf).

Senator Cotton also consistently advocates for Project 2025's central themes. He advocates for a strong military focused on warfighting, criticizes perceived "wokeness" in the armed forces, and supports policies to enhance readiness [[^]](https://static.project2025.org/2025_MandateForLeadership_SECTION-02.pdf). Former Acting Secretary of Defense Chris Miller is broadly expected to align with these goals given his past role in the Trump administration.

## Did Stephen Feinberg Back Pete Hegseth's Secretary of Defense Appointment?

Hegseth's Cabinet Role | Confirmed as Secretary of Defense [[^]](https://www.navytimes.com/news/pentagon-congress/2025/01/25/hegseth-confirmed-as-next-defense-secretary-by-narrow-senate-vote/) |
Stephen A. Feinberg's Donor Role | Significant donor to "Rebuilding America Now PAC" [[^]](https://littlesis.org/relationships/1261286) |
Direct Backing for Hegseth's Appointment | No specific financial or public endorsement found from Feinberg, Mercer, or "Rebuilding America Now PAC" [[^]](https://www.navytimes.com/news/pentagon-congress/2025/01/25/hegseth-confirmed-as-next-defense-secretary-by-narrow-senate-vote/) |

**Pete Hegseth secured confirmation as Secretary of Defense**

Pete Hegseth secured confirmation as Secretary of Defense. He was successfully confirmed to the position in the Donald Trump administration after navigating a narrow Senate vote, which ultimately required a tie-breaking decision by the Vice President [[^]](https://www.navytimes.com/news/pentagon-congress/2025/01/25/hegseth-confirmed-as-next-defense-secretary-by-narrow-senate-vote/). His journey from a potential nominee to a confirmed cabinet member was closely observed by prediction markets, which provided real-time odds for various cabinet roles, including the Secretary of Defense [[^]](https://polymarket.com/event/who-will-be-trumps-defense-secretary).

Key conservative donors' direct support for Hegseth remains unclear. Stephen A. Feinberg is identified as a significant figure among major conservative donors, having contributed to the "Rebuilding America Now PAC" [[^]](https://littlesis.org/relationships/1261286). This political action committee is known to have received donations from a variety of sources [[^]](https://www.opensecrets.org/political-action-committees-pacs//C00618876/donors/2016). However, the available research does not provide specific information detailing significant financial or public endorsement backing for Pete Hegseth directly from Stephen A. Feinberg, Rebekah Mercer, or the "Rebuilding America Now PAC" in connection with his appointment [[^]](https://www.navytimes.com/news/pentagon-congress/2025/01/25/hegseth-confirmed-as-next-defense-secretary-by-narrow-senate-vote/).

## How Do Trump's Loyalty Tests Influence Pentagon Appointments?

Trump's Priority | Loyalty in next Pentagon chief appointment [[^]](https://www.ksat.com/news/politics/2024/11/11/trump-is-likely-to-name-a-loyalist-as-pentagon-chief-after-first-term-tumult/) |
Syria Withdrawal Criticism | Faced strong criticism from Key Republicans and lawmakers [[^]](https://www.defensenews.com/congress/2019/10/07/key-republicans-dems-blast-trumps-surprise-syria-withdrawal/) |
Pompeo on Generals | Generals were "acting in ways that were political" under Trump [[^]](https://ijr.com/pompe-generals-acting-ways-political-trump/) |

**Trump's first-term decisions established significant "loyalty tests" for future appointees**

Trump's first-term decisions established significant "loyalty tests" for future appointees. His unexpected withdrawal of U.S. troops from Syria drew sharp criticism from "Key Republicans" and lawmakers, creating a potential liability for any candidate who opposed the decision [[^]](https://www.defensenews.com/congress/2019/10/07/key-republicans-dems-blast-trumps-surprise-syria-withdrawal/). This aligns with Trump's stated emphasis on appointing a "loyalist" as Pentagon chief [[^]](https://www.ksat.com/news/politics/2024/11/11/trump-is-likely-to-name-a-loyalist-as-pentagon-chief-after-first-term-tumult/). Furthermore, his strained relationships with prominent figures such as former Defense Secretary Jim Mattis and Gen. Mark Milley established a precedent where perceived disloyalty could disqualify military leadership [[^]](https://www.ksat.com/news/politics/2024/11/11/trump-is-likely-to-name-a-loyalist-as-pentagon-chief-after-first-term-tumult/).

Candidates navigate loyalty tests with varying strategies and past statements. Mike Pompeo, who served as Trump's Secretary of State, aligns with the "Trump World" framework of loyalty by stating that generals under Trump were "acting in ways that were political" [[^]](https://ijr.com/pompe-generals-acting-ways-political-trump/). This stance potentially positions Pompeo favorably by echoing Trump's skepticism of the military establishment. Conversely, Tom Cotton has publicly refuted "right-wing pundits," demonstrating his awareness and defense against loyalty tests emanating from within his conservative base [[^]](https://www.mediaite.com/politics/gop-senator-torches-right-wing-influencers-who-sound-like-elizabeth-warren-and-rashida-tlaib/).

MAGA factions actively highlight loyalty issues to vet candidates. "MAGA loyalists" are specifically "take[n] aim at GOP senator[s]" regarding key defense appointments, indicating a deliberate effort to ensure candidates align with Trump's policy preferences [[^]](https://www.foxnews.com/politics/maga-loyalists-take-aim-gop-senator-key-trump-defense-post-sparks-controversy-why-opposition.print). This dynamic is part of what has been called "Trump World's Confirmation Playbook," which leverages "MAGA Dogs" to enforce loyalty during the appointment process [[^]](https://www.thebulwark.com/p/trump-worlds-confirmation-playbook). Any candidate for a top defense post will therefore likely face intense scrutiny from these factions concerning their past positions on issues such as Syria, NATO, and their relationships with military leadership [[^]](https://www.foxnews.com/politics/maga-loyalists-take-aim-gop-senator-key-trump-defense-post-sparks-controversy-why-opposition.print).

## Who Vets Defense Nominees for Trump's Transition Team?

Pentagon Transition Lead | Robert Wilkie [[^]](https://www.militarytimes.com/news/pentagon-congress/2024/11/07/former-va-secretary-to-lead-trumps-pentagon-transition-efforts/) |
Key Defense Player | Kash Patel [[^]](https://www.militarytimes.com/news/pentagon-congress/2024/11/07/former-va-secretary-to-lead-trumps-pentagon-transition-efforts/) |
National Security Leads | Robert C. O'Brien and John Ratcliffe [[^]](https://theconservativetreehouse.com/blog/2024/11/07/trump-transition-team-leaders-indicate-likely-trump-administration-officials/) |

**Several key figures are tasked with vetting potential defense nominees for Donald Trump's nascent transition team**

Several key figures are tasked with vetting potential defense nominees for Donald Trump's nascent transition team. Robert Wilkie, who previously served as Secretary of Veterans Affairs, is leading the specific Pentagon transition efforts [[^]](https://www.militarytimes.com/news/pentagon-congress/2024/11/07/former-va-secretary-to-lead-trumps-pentagon-transition-efforts/). Kash Patel, identified as a significant player in a potential second Trump administration, previously headed the Pentagon transition in 2020 [[^]](https://www.militarytimes.com/news/pentagon-congress/2024/11/07/former-va-secretary-to-lead-trumps-pentagon-transition-efforts/). Beyond these defense-focused leads, Robert C. O'Brien, Trump's former National Security Advisor, and John Ratcliffe, Trump's former Director of National Intelligence, are overseeing the broader National Security policy area for the transition, making them highly influential in vetting high-level defense appointments [[^]](https://theconservativetreehouse.com/blog/2024/11/07/trump-transition-team-leaders-indicate-likely-trump-administration-officials/).

Loyalty and alignment with the "MAGA agenda" guide nominee selection. The collective ideology of these gatekeepers and the broader transition structure places a strong emphasis on personal loyalty to Donald Trump and commitment to advancing his "MAGA agenda" [[^]](https://theconservativetreehouse.com/blog/2024/11/07/trump-transition-team-leaders-indicate-likely-trump-administration-officials/). Given this primary focus on personal allegiance and alignment with Trump's specific policy vision, their preferences are likely to favor perceived loyalist reformers over traditional defense hawks. Figures such as Christopher C. Miller or Keith Kellogg align more closely with the profile of individuals who have demonstrated unwavering dedication to Trump's leadership and policy direction, suggesting a preference for those viewed as direct extensions of Trump's will [[^]](https://theconservativetreehouse.com/blog/2024/11/07/trump-transition-team-leaders-indicate-likely-trump-administration-officials/).

## What Could Change the Odds

**Key takeaway.** Catalyst analysis unavailable.

## Key Dates & Catalysts

- **Expiration:** January 20, 2029
- **Closes:** January 20, 2029

## Decision-Flipping Events

- Catalyst analysis unavailable.

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## Historical Resolutions

No historical resolution data available for this series.

## Disclaimer

This content is for informational and educational purposes only and does not constitute financial, investment, legal, or trading advice.
Prediction markets involve risk of loss. Past performance does not guarantee future results.
We are not affiliated with Kalshi or any prediction market platform. Market data may be delayed or incomplete.

### Data Sources & Model Transparency

**Data Sources:** Octagon Deep Research aggregates information from multiple sources including news, filings, and market data.

**Freshness:** Analysis is generated periodically and may not reflect the latest developments. Verify critical information from primary sources.