It's about 10:35 am on the east coast, and Obama is due to have a press conference in half an hour. He will presumably answer the Blago questions.
Politico has a list of seven questions he should answer. They seem reasonable -- what kind of contact did his team have with Blago's on the appointment; when did he last talk to Blago personally, and about what; did he and his people get wind of anything possibly illegal that they should have taken to law enforcement; and so on.
If he has good answers to all these things, he can probably put doubts to rest. What's interesting here of course is that if anyone on his team talked to Blago or John Harris, chances are good it's on tape. So another question is, what is Fitzgerald sitting on?
I'll watch the press conference and write a longer report early afternoon east coast time.