Opponents of North Carolina's HB2 law, limiting bathroom access for transgender people, protest in the gallery above the state's House of Representatives chamber in Raleigh, North Carolina, on December 21, 2016.

House Bill 2, North Carolina's controversial law best known for restricting bathroom access for transgender individuals, has cost the state millions of dollars, hundreds of jobs, numerous entertainment and sporting events and, arguably, one Republican governor.

Yet, despite those costs — and the price of attracting national scorn — the GOP lawmakers who rammed HB2 into law last March can't seem to quit it.