Barack Obama on Thursday delivered a primer for the nation on the strange and often sordid universe of Illinois politics as the president-elect promised full disclosure—soon—of any contact between his aides and Gov. Rod Blagojevich's administration over a new U.S. Senate pick. Two days after Blagojevich was arrested and charged with trying to sell Obama's former seat, the incoming president weighed in with his first detailed comments about a distracting home front scandal. Obama said he had not been contacted by federal authorities, had never spoken to Blagojevich about the Senate vacancy and was "confident that no representatives" of his...