Blagojevich asked the people of Illinois to reserve judgment and have patience. He said he was "absolutely certain that I will be vindicated," adding, "I have on my side the most powerful ally there is, the truth."
"I'm not going to quit a job the people hired me to do because of false accusations and a political lynch mob," Blagojevich said.
According to an affidavit filed in the case, the Democratic governor and his chief of staff, John Harris, attempted to use the governor's authority to auction off Obama's vacated Senate seat "for the purpose of obtaining personal benefits for Rod Blagojevich, including, among other things, appointment as secretary of health and human services in the president-elect's administration."
"Blagojevich put a 'for sale' sign on the naming of a United States senator," alleged U.S. attorney Patrick Fitzgerald. "The breadth of corruption laid out in these charges is staggering."
ABC News' Zach Wolf, Matt Jaffe, Scott Michels and Theresa Cook contributed to this story.