.@SenJohnBarrasso and @SenJoniErnst on the Iowa Caucus taking place next Monday "Will they be supporting VP Biden at this point? Not sure about that"

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— CSPAN (@cspan) January 27, 2020

"I think this door of impeachable whatever has been opened," Ernst said in an interview with Bloomberg News. "Joe Biden should be very careful what he's asking for because, you know, we can have a situation where if it should ever be President Biden, that immediately, people, right the day after he would be elected would be saying, 'Well, we're going to impeach him.'"
[...]
The grounds for impeachment, the first-term Republican said, would be "for being assigned to take on Ukrainian corruption yet turning a blind eye to Burisma because his son was on the board making over a million dollars a year."
[...]
Biden has been sure to mention Ernst's comments during every stump speech he's made this week, drawing applause as he suggests that Ernst had "spilled the beans" about Republicans' real intention in raising the Burisma issue to damage Biden's candidacy. "You can ruin Donald Trump's night by caucusing with me and ruin Joni Ernst's night as well," he's told Iowa crowds this week.