Donald Trump endorsed Hungarian Prime Minister Viktor Orbán on Truth Social Friday, pledging the "full Economic Might" of the United States behind Orbán's reelection bid. Hungary votes tomorrow. Prediction markets say Trump picked the wrong horse.

On Polymarket, Péter Magyar's Tisza party sits at roughly 67% to win the most seats in tomorrow's parliamentary election, with 78-83% odds of securing 90 or more seats [1]. OddsShift aggregations show Tisza's probability even higher, ranging from 67-82% depending on the market [2]. Fidesz, Orbán's party, sits at roughly 18-33% — the kind of odds you get on a longshot, not a frontrunner.

Trump's endorsement did not address the polling. It framed Orbán as a "strong leader" fighting "radical left ideology," language that mirrors his domestic messaging more than Hungary's political reality. The endorsement follows JD Vance's recent visit to Budapest, which drew international attention but did not move the prediction markets.

The stakes are not small. Tisza could win a supermajority — 133 or more seats — which would give Magyar the power to rewrite Hungary's constitution, undo Orbán's judicial capture, and reverse over a decade of democratic backsliding [1]. An Orbán loss would also strip Trump of his most prominent European ideological ally.

Endorsing a leader on the eve of an election he is projected to lose is not diplomacy. It is brand association with a declining asset. By Sunday, the prediction markets will have rendered their verdict.