Mr. Pratt, a former reality TV star, has proved adept at raising funds among people who cannot vote for him. His rivals in the race have taken a more local approach.
Josh Turek secured the Democratic nomination for the Iowa senate seat race. During the lead up to the primaries, state Sen. Zach Wahls tried to characterize his primary rival Turek as an extension of Senate Minority Leader Chuck Schumer of New York.
Alme won the nomination, NBC News projects, after a late launch following GOP Sen. Steve Daines' last-minute retirement, sparking criticism that Daines picked his successor.
The former House member built her reputation by grilling corporate executives, and she has a strong command of policy. But questions about her demeanor have been a drag on her campaign.