According to Mr. Harris, the resolution has no Republican co-sponsors because of “concerns regarding threats of violence and political retribution.”

It takes a two-thirds majority to expel a House member, meaning the resolution’s success would require almost 70 Republicans to join all the House’s Democrats in the 219-211 chamber.

The 73 Democratic co-sponsors include Reps. Alexandria Ocasio-Cortez of New York and Debbie Wasserman Schultz of Florida, the former Democratic National Committee chairwoman.