When the Governor of Illinois becomes unable to discharge the duties of that office, the lieutenant governor becomes acting governor. If the Governor dies, resigns or is removed from office, the lieutenant governor becomes governor. Under the Illinois Constitution, the Attorney General, currently Lisa Madigan, is next in line of succession to the Governor's office after the lieutenant governor, but does not succeed to the Lieutenant Governor's office. Historically, the lieutenant governor has been from either the Democratic Party or Republican Party. 