The Republican congresswoman said just last year that she was an ally, even describing herself as ‘pro trans.’

South Carolina U.S. Representative Nancy Mace told CBS News last year that she was "pro-transgender rights" and "pro-LGBTQ."

ANALYSIS: Nancy Mace’s turn from a swing-district mainstream Republican to a vocal anti-trans voice reveals just as much about the state of the GOP as it does her, Eric Garcia writes