Hasan will get a very expensive lawyer who will naturally tell him to shut the hell up. A cheap one will do this too, but for Hasan the idea of hiring anything other than a $1,000/hr lawyer would ruin his aesthetic. Of course, Hasan isn't the type of person who's capable of following that advice. He's such a narcissist that he really believes that he's the smartest person in the room and he'll fuck up and say something. Even if he does nothing but plead the fifth in front of Congress while his lawyer gives his death glares and kicks under the table to remind him, he'll just brag about what really happened later on his stream when someone in his chat gets him worked up. Unless his lawyer can get him to stop streaming until everything is over, he'll hang himself eventually.
He's also that sort of person who will absolutely roll over on everyone else if he even thinks he might catch a charge. As much as he likes to front his machismo persona, he's a rat bitch that will throw anyone under the bus who isn't family and maybe even some that are if it would let him get out clean. One way or another, his career will be completely ruined by this. Either he loses face and the lefty crab bucket devours him in a scramble for his prior position or he betrays them and becomes a complete pariah.
The absolute peek outcome would be if Hasan turns on the rest of them to get off scot-free himself and has try to turn into a rightwing grifter to have any kind of audience if only for the sheer narcissistic audacity of it all. Hasan is a consummate grifter and would do it all with a straight face if it got him paid.