GOP Sen. Joni Ernst’s approval ratings are plummeting, another good sign for Senate Democrats

A year ago, things were looking pretty rosy for GOP Sen. Joni Ernst of Iowa, with her approval rating hitting a high point of 57% in February 2019. A year later, following Senate Republicans' sham zero-witness impeachment trial and their subsequent acquittal of Donald Trump, Ernst's approval ratings have taken a hit, slipping fully 10 points to 46%.

A plurality of Iowa voters, 41%, still say they will definitely vote for Ernst this fall, but 31% also vowed to vote against her, and another 20% were open to considering someone else. Democrats are currently fielding candidates in a five-way primary, so Ernst's challenger isn't clear yet. But starting the race with 51% of your constituents either vowing to vote against you or open to an alternative is not a strong start for an incumbent senator. 

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Hawkeye State independents reflect the wariness of the larger electorate, with 32% pledging to back Ernst and 25% promising to vote against her, while 31% consider voting for someone else.

Trump's stumbles on trade and Ernst's unwillingness to challenge him on anything are also part of the equation. One undecided voter said she would support whoever was willing to take on Trump. "You have to get people in there who are willing to take him on,” said 62-year-old Kerri Christian. 

Ernst joins a quartet of GOP senators who are facing an uphill climb to reelection: Susan Collins of Maine, Cory Gardner of Colorado, Martha McSally of Arizona, and Thom Tillis of North Carolina. In addition, Democrats just put another GOP seat in play with the announcement that Montana Gov. Steve Bullock would take on GOP Sen. Steve Daines for his seat in November. 

That's half a dozen solid GOP targets to work with in a year in which Democrats need a net gain of three or four pick-ups, depending on whether Trump is reelected, in order to flip the chamber.