January 30, 2013 (CHICAGO)

Rod Blagojevich was governor from 2002 to 2009. He was convicted of numerous corruption charges in 2011, including allegations that he tried to sell or trade President Barack Obama's old Senate seat. He is currently serving a 14-year sentence at a federal prison in Colorado.

Blagojevich was impeached on this date, January 30, four years ago.

Dan Walker, governor from 1973 through 1977, pleaded guilty to bank fraud and other charges in 1987 related to his business activities after leaving office. He spent about a year and a half in federal prison.

Otto Kerner, governor from 1961 through 1968, spent three years in prison after being convicted of bribery related charges.