Trump finds himself locked in a close race in Iowa with Democrat Joe Biden, and Ernst is as well against Democratic challenger Theresa Greenfield. Walking the tightrope between pleasing the Trump base versus attracting other voters is challenging," said John Stineman, a Iowa Republican strategist unaffiliated with the Ernst or Trump campaigns. “You have the road of the radical left,” she said while introducing Vice President Mike Pence at the Iowa State Fairgrounds in August. Trump carried Iowa by 9.4 percentage points in 2016 and Ernst surprised four-term Democratic Rep. Bruce Braley by nearly as much in 2014. The National Republican Senatorial Campaign Committee has spent $11.3 million supporting Ernst, according to Kantar.