“He doesn’t show any signs of resigning or any willingness to do that,” said Ms. Madigan, who has long been viewed as a rival to Mr. Blagojevich. “It will take time for an impeachment proceeding, and it may end up that the most efficient way to proceed is to have the Supreme Court declare him unfit. We are certainly considering that.”

Image Gov. Rod R. Blagojevich of Illinois with his wife, Patti, in Chicago after he won the Democratic nomination in March 2006. Credit... Brian Kersey/Associated Press

Much of the political world in Chicago and Springfield was buzzing Wednesday with guesses, based on hints in the court papers, about the identities of the various other people in the complaint, including those under consideration by the governor for Mr. Obama’s seat. At his news conference, Mr. Jackson acknowledged that he was the politician referred to as Senate Candidate 5 in the complaint; Valerie Jarrett, who is to be one of Mr. Obama’s White House aides, had previously been identified as Senate Candidate 1.

According to the complaint, in the weeks of recorded phone calls at his home and campaign office, Mr. Blagojevich considered various ways that he might financially gain from the possible Senate appointments. He talked about how one potential choice might help him secure a post with the Obama administration as a cabinet secretary, and he also talked about possible deals that might win him a union leadership post or a high-paying job with a nonprofit organization.

The complaint also said the governor was trying to obtain contributions from a lengthy list of people and companies, a list that the complaint said was turned over to the Federal Bureau of Investigation. The document also provided a compendium of instances in which Mr. Wyma, the Blagojevich associate cooperating with the authorities, said Mr. Blagojevich had exhorted Mr. Wyma and others to quickly bring in hundreds of thousands of dollars in cash.

The complaint said Mr. Blagojevich told Mr. Wyma in early October that he wanted the chief executive of Children’s Memorial Hospital in Chicago to raise $50,000 after it had been awarded $8 million in state money. At one point, Mr. Blagojevich threatened to withdraw the state money because the hospital executive had failed to make an earlier contribution the governor had expected, the complaint said.