Not one person in America has yet voted for Donald Trump, but brace yourself: people are betting good money that he's going to sweep the Republican party nomination. Users of PredictIt, who bet real money on their expectations of political outcomes, say Trump has a 44% chance of winning the Republican presidential nomination. That's 14 percentage points higher than the candidate in second place on the PredictIt market, Sen. Marco Rubio, who users say has a 30% chance.