Republican Jim Carlin said he is running against U.S. Sen. Joni Ernst because she has failed to deliver on her famous "make 'em squeal" mantra.

As Ernst was answering a question about Medicaid eligibility in Trump's tax cut bill, she was interrupted by a woman in the crowd, who shouted, "People will die!"In the lead-up to the 2020 election, all eyes are on Iowa.