Texas’ GOP-led House of Representatives was set to hold historic impeachment proceedings against Attorney General Ken Paxton on Saturday as the scandal-plagued Republican called on supporters to protest a vote that could lead to his ouster.

The House scheduled an afternoon start for debate on whether to impeach and suspend Paxton from office over allegations of bribery, unfitness for office and abuse of public trust — just some of the accusations that have trailed Texas’ top lawyer for most of his three terms.

The hearing sets up what could be a remarkably sudden downfall for one of the GOP’s most prominent legal combatants, who in 2020 asked the U.S. Supreme Court to overturn President Joe Biden’s electoral defeat of Donald Trump. Only two officials in Texas’ nearly 200-year history have been impeached.