It’s worth noting that only once, in 2000, has the Iowa winner gone on to win the GOP nomination; it’s also true that Trump benefited from low turnout, as his victory captured a comparatively small proportion of the electorate — less than 60,000 of Iowa’s 700,000+ registered Republicans voted for him. First lady Jill Biden visited Utah this week, meeting with teachers and administrators at a Salt Lake County high school. The Republican primary field shrunk again after Iowa, with only two Trump challengers remaining: Nikki Haley and Ron DeSantis.