They think that Gorsuch and Kavanaugh lied to them. They did but Collins and Manchin should have known better. I and millions of others knew better. Trump made it clear that he was going to appoint anti-abortion judges and he did.
Collins and Manchin should take responsibility for their poor judgment but they won’t. They’ll just blame the lying justices.
If Manchin and Collins wanted to do something to make up for being chumps: