The bill would bar transgender members of the House of Representatives from using single-sex bathrooms that correspond to their gender identity.

McBride, the first out transgender person elected to Congress, will serve in the House starting next year, and Mace doesn't want her using women's bathrooms at the Capitol.

Republican Rep. Nancy Mace said she's going to "fight like hell" for a resolution to keep Sarah McBride from using the women's bathroom.