A point of clarity on the Siegelman case
Some points seem to be getting conflated or confused as this issue goes national, so it's important to keep a key distinction clear. The issue of whether political considerations played any role in the investigation and prosecution of Siegelman is independent of the issue of whether he is guilty of the crimes for which a federal jury convicted him. To a lesser extent, so is the issue of whether other politicians were subjected to the same sort of scrutiny.
Not having been at the trial or privy to investigative decisions, I'll withhold judgment one way or the other on those questions. But remember, they are separate questions.