Who will Donald Trump endorse in the 2028 presidential election?
PoliticsOne-OffUS PoliticsElection1y
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Data as of Nov 11, 2026, 6:32 PM UTC · policy pm-quality-4
Selected book midpoint
Marco Rubio · —
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Stored price
Marco Rubio 42.5%Leader of 6 outcomes
Marco Rubio 42.5%Market quality
59 / 100
Medium quality24h Volume
$141.1
Open interest
$30.2K
High open interestBid / Ask
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Marco RubioSpread
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Market data
Updated 49 minutes ago
LaggingJul 27, 26, 5:30 PM UTCMar 1, 28, 3:00 PM UTC
Chart and changes show stored historical probabilities, not the selected live book.
Trends
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Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 30m (informational)
Market depth · Marco Rubio
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KalshiRules
If Donald Trump publicly endorses Marco Rubio in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
Settles via:Donald Trump
- An "endorsement" requires: A clear, affirmative statement of support for candidate's election The statement must be public (not private communications) The endorsement must specifically reference the 2028 presidential election or be clearly in context of the 2028 presidential election The endorsement must come directly from Donald Trump or through official channels The following scenarios would resolve to YES: Donald Trump states "I endorse candidate for [office]" Donald Trump states "I support candidate" with clear reference to the 2028 presidential election Donald Trump states "I'm voting for candidate" publicly Donald Trump states "candidate has my full support" for the 2028 presidential election Donald Trump appears at campaign events specifically to endorse Donald Trump releases official endorsement through their organization Donald Trump allows their name/image to be used in candidate's campaign materials Statements of obvious sarcasm (or which are immediately followed by clarifications that Donald Trump is joking) are NOT encompassed by the Payout Criterion. The Contract shall resolve immediately upon confirmation of the first qualifying endorsement in the specified race. If multiple candidates are listed for a listed race and exactly one is endorsed, that candidate's strike resolves "Yes" at $1.00 and all other named-candidate strikes resolve "No." If multiple are endorsed, each endorsed candidate's strike resolves "Yes" at a value of ($1.00 / N) rounded down to the nearest $0.01. If no endorsement occurs before expiration, the "No one" strike resolves "Yes" at $1.00 and all named-candidate strikes resolve "No."
Rules for each outcome
- Marco Rubio
- If Donald Trump publicly endorses Marco Rubio in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
- J.D. Vance
- If Donald Trump publicly endorses J.D. Vance in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
- No one
- If Donald Trump publicly endorses no one in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
- Himself
- If Donald Trump publicly endorses himself in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
- Donald J. Trump Jr.
- If Donald Trump publicly endorses Donald J. Trump Jr. in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
- Ron DeSantis
- If Donald Trump publicly endorses Ron DeSantis in the 2028 presidential election before Mar 1, 2028, then the market resolves to Yes.
