Former President Donald Trump won the 2024 Iowa Republican caucuses with over 50% of the vote, more than doubling his support from 2016. Ron DeSantis edged out Nikki Haley for second place, providing a boost for his campaign after investing heavily in Iowa. Trump dominated among key Iowa GOP groups like non-college voters, rural voters, and very conservative voters. Voters prioritized mental capacity and strong leadership in a candidate, with those focusing on mental capacity overwhelmingly supporting Trump by 28 points despite Haley's challenges to his stamina.
