Who will be Trump's next Secretary of Defense?
Short Answer
1. Market Behavior & Drivers
- 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.
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. |
| Tom Cotton | 2.9% | 1.2% | Tom Cotton is a hawkish Senator with military background, often mentioned for national security roles. |
| Elbridge Colby | 0.1% | 0.1% | Elbridge Colby is a defense policy expert, but lacks strong direct links to Trump for the role. |
2. Price Chart
Historical Price (Probability)
3. Market Data
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.
Available Contracts
Market options and current pricing
| Outcome bucket | Yes (price) | No (price) | Last trade probability |
|---|---|---|---|
| No other person | $0.49 | $0.53 | 52% |
| Dan Driscoll | $0.09 | $0.94 | 47% |
| Ron DeSantis | $0.15 | $0.89 | 16% |
| Steve Feinberg | $0.04 | $0.98 | 9% |
| Joni Ernst | $0.10 | $0.95 | 6% |
| Wesley Hunt | $0.04 | $0.99 | 5% |
| Mike Pompeo | $0.04 | $1.00 | 5% |
| Keith Kellogg | $0.04 | $1.00 | 4% |
| Mike Rogers | $0.03 | $1.00 | 3% |
| Tom Cotton | $0.03 | $0.99 | 3% |
| Bill Hagerty | $0.02 | $1.00 | 2% |
| Christopher Miller | $0.02 | $1.00 | 2% |
| Mike Gallagher | $0.02 | $1.00 | 2% |
| Trae Stephens | $0.02 | $1.00 | 2% |
| Mike Waltz | $0.01 | $1.00 | 1% |
| Tulsi Gabbard | $0.01 | $1.00 | 1% |
| Elbridge Colby | $0.00 | $1.00 | 0% |
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.
4. Trust Index
Official decision: one office decides and holds the answer before the public
Integrity risk· Information exposure
Includes the cost to trade: a $10,000 order loses about 13760% of the price to slippage.
Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index
5. 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 [1]. |
|---|---|
| Approved Foreign Trip | Kellogg's March 2024 Israel visit with Trump allies was explicitly approved by Donald Trump [2]. |
| Other Candidate Details | Insider reporting on private face-time for Mike Waltz and others is not extensively detailed [3]. |
6. 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 [1] |
|---|---|
| Sen. Tom Cotton Alignment | Advocates strong military, criticizes "wokeness," supports readiness policies [2] |
| Project 2025 Defense Focus | Reasserts presidential control over DoD, reforms military culture, prioritizes combat readiness and recruitment [2] |
7. Did Stephen Feinberg Back Pete Hegseth's Secretary of Defense Appointment?
| Hegseth's Cabinet Role | Confirmed as Secretary of Defense [1] |
|---|---|
| Stephen A. Feinberg's Donor Role | Significant donor to "Rebuilding America Now PAC" [2] |
| Direct Backing for Hegseth's Appointment | No specific financial or public endorsement found from Feinberg, Mercer, or "Rebuilding America Now PAC" [1] |
Sources (4)
- 1Hegseth confirmed as next defense secretary by narrow Senate votenavytimes.com
- 2Donation: Stephen Feinberg, Rebuilding America Now - LittleSislittlesis.org
- 3Who will be Trump's Defense Secretary? Predictions & Od... | Polymarketpolymarket.com
- 4Rebuilding America Now PAC Donors • OpenSecretsopensecrets.org
8. How Do Trump's Loyalty Tests Influence Pentagon Appointments?
| Trump's Priority | Loyalty in next Pentagon chief appointment [1] |
|---|---|
| Syria Withdrawal Criticism | Faced strong criticism from Key Republicans and lawmakers [2] |
| Pompeo on Generals | Generals were "acting in ways that were political" under Trump [3] |
Sources (6)
- 1Trump is likely to name a loyalist as Pentagon chief after tumultuous first termksat.com
- 2Key Republicans, Dems blast Trump’s surprise withdrawal from Syriadefensenews.com
- 3Pompeo Says Generals Were ‘Acting in Ways That Were Political’ Under Trump – IJRijr.com
- 4Tom Cotton Rips Right-Wing Pundits Who Sound Like Liz Warrenmediaite.com
- 5MAGA loyalists take aim at GOP senator as key Trump defense post sparks controversy: 'Why the opposition?'foxnews.com
- 6Trump World’s Confirmation Playbook: Speak Loudly and Unleash the MAGA Dogsthebulwark.com
9. Who Vets Defense Nominees for Trump's Transition Team?
| Pentagon Transition Lead | Robert Wilkie [1] |
|---|---|
| Key Defense Player | Kash Patel [1] |
| National Security Leads | Robert C. O'Brien and John Ratcliffe [2] |