Kalshi· Elections· open· closes 2028-11-07

Will Marco Rubio be the nominee for the Presidency for the Republican party? — Marco Rubio

Marco Rubio must win and accept the nomination for the Presidency for the Republican party in 2028.
“If Marco Rubio wins and accepts the nomination for the Presidency for the Republican party in 2028, then the market resolves to Yes.” — market rules ↗
The other party has to be the Republican party
“If Marco Rubio wins and accepts the nomination for the Presidency for the Republican party in 2028, then the market resolves to Yes.” — market rules ↗
Has to happen before November 7, 2028
“The Expiration Date of the Contract shall be the sooner of the date of the first 10:00 AM ET following the occurrence of an event encompassed by the Payout Criterion for any candidate or the day of the November popular vote for the Presidency in <election year>.” — contract terms ↗
Counts as done when: the first person to have been nominated by the party and to have accepted the nomination
“The Payout Criterion for the Contract encompasses the Expiration Values that <candidate> is the nominee (they are the first person to have been nominated by the party and to have accepted the nomination) for <political party> in <election year>.” — contract terms ↗
Decided by: Republican Party
“The Source Agency is <political party>.” — contract terms ↗

Marco Rubio is nominated but does not accept the nomination
Marco Rubio accepts the nomination but was not the first person to be nominated and accept
Marco Rubio wins the nomination after the November 2028 popular vote date

WATCH
Some obvious wins don't count
WATCH
The venue keeps a right to review the outcome
“Before Settlement, Kalshi may, at its sole discretion, initiate the Market Outcome Review Process pursuant to Rule 6.3(c) of the Rulebook.” — contract terms ↗
NOTE
A specific counterparty is named
“If Marco Rubio wins and accepts the nomination for the Presidency for the Republican party in 2028, then the market resolves to Yes.” — market rules ↗

Read on 2026-09-09 from the documents listed under “What we read”. Facts and gaps only — not a prediction.

What we read

If Marco Rubio wins and accepts the nomination for the Presidency for the Republican party in 2028, then the market resolves to Yes.

What counts as 'winning' the nomination (convention vote, delegate count, etc.)
What form of acceptance is required
Whether revisions to the Underlying after Expiration would include situations where acceptance is withdrawn
How the Republican Party website will document the nominee and acceptance