1) He's been caught manipulating text messages for the 1/6 Commission that made it appear Trump was in the know, when he wasn't.
2) Republicans would like to know where the whistleblower is who supposedly started the Russian inquiry? They showed videos galore of Schiff making excuse after excuse as to why the person wasn't showing up for Trump's impeachment hearing. Keep in mind, Schiff wasn't just any Senator, he was the head of the Intel Committee and he used it to sell his lies. He kept making it sound like he had an inside lane to the truth, and he'd invoke the names of Brennan and Clapper, who everyone now knows are just as corrupt as Schiff. The fact is, Schiff told a very dangerous lie in this regard, because he made the person up. This whistleblower doesn't exist, and Schiff can't prove that he ever did because he has no proof through emails, phone records, text, etc.
Quite frankly, Schiff should've already been recalled by his constituents. He's one of the most corrupt politicians we've ever had yet I guess his constituents don't care. If it were pretty much any other state, he probably would be kicked out of the Senate, but not California. That should tell us something.