A week ago, Mexican President Andres Manuel Lopez Obrador was on a roll with his anti-corruption campaign, boosted by a video of rivals counting piles of cash and leaked testimony that could bring down more opponents.

But after two videos surfaced Thursday, showing his brother taking packets of cash from a state political operator three years before the president was elected, Lopez Obrador finds himself in a fight to regain his own integrity as a crusader against graft.

Over the weekend, the two recordings from 2015 made their rounds on social media, implicating the leader’s allies in illegal financing antics.