Miller-Meeks, a Republican who represents a politically competitive district in Iowa, voted for Jordan the first time but switched to vote for Representative Kay Granger, chair of the House Appropriations Committee, on Wednesday afternoon.

Since then, Miller-Meeks said in a statement, she has received “a barrage of threatening calls” in addition to multiple death threats. She added that the authorities have been notified and her office is fully cooperating.

“One thing I cannot stomach, or support is a bully,” she said. “I did not stand for bullies before I voted for Chairwoman Granger and when I voted for Speaker designee Jordan, and I will not bend to bullies now.”

It was not immediately clear who made the threats.