Hastert allegedly knew about the Foley problem for years. Money quote:
Kirk Fordham, former chief of staff for Foley, told ABC News today that sometime in late 2003, he told the Speaker's chief of staff that Foley was getting too close to young male pages. Fordham says the Speaker's aide, Scott Palmer, then met with Foley. Fordham also said the Speaker knew about the meeting.
If that last sentence is true, Hastert is toast. According to Fordham, Hastert knew about the problem, did nothing, and then lied about it. That's a lethal trifecta.