A sitting congresswoman is pushing to get the incoming, first-ever openly transgender member of Congress barred from using women’s bathrooms at the U.S. Capitol.

Republican Rep. Nancy Mace introduced legislation to ban trans women from using single-sex bathrooms on Capitol Hill, targeting Rep.-elect Sarah McBride, the first openly trans member of Congress. Here's what the bill says and what the reaction has been.

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.