South Carolina U.S. Representative Nancy Mace 's former aide ripped into the Republican Wednesday over her efforts to ban transgender lawmakers from using restrooms in the U.S. Capitol that correspond to their gender identity.

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.