CNBC: Here are the seven senators most likely to lose their seats in 2020
“Ernst was first elected in 2014 to the seat held by retiring Democratic Sen. Tom Harkin, who easily won his last re-election in 2008. While Iowa voted to elect Obama president twice, the state went for Trump in 2016 by more than 9 points. That year, seven–term incumbent Republican Sen. Chuck Grassley easily won re-election.
But Democrats in Iowa posted solid gains in this year’s midterm elections, flipping two of the three GOP-held House seats from red to blue. Iowa’s fourth congressman, seven-term Democratic Rep. Dave Loebsack, easily won re-election.”