Sources: "Senate Candidate 5" is Jesse Jackson Jr

Jackson Jr. said “I don’t know” when asked if he was Candidate #5, but said he was told “I am not a target of this investigation.”

Jackson Jr. said he agreed to talk with federal investigators “as quickly as possible” after he consults with a lawyer.

The Congressman, a son of the famed civil rights leader, denied that anyone had been authorized to make payments or promises to the Governor on his behalf.