The party “agrees with the strong majority of Republicans in both the U.S. House of Representatives and Senate that the Democrat-led attempt to impeach a former president lies outside the United States Constitution,” the statement said.

Mr. Burr released a brief statement in response saying that it was a “truly sad day” for Republicans in his state.

“My party’s leadership has chosen loyalty to one man over the core principles of the Republican Party and the founders of our great nation,” he said.