Federal:

• http://www.whitehouse.gov/history/presidents/
  (White House - Information on Presidents)

• http://www.congresslink.org/ (U.S. Congress)

• http://www.epa.gov/ (Environmental Protection Agency)

• http://www.fbi.gov/
  (Federal Bureau of Investigation)

State:

• http://www.migov.state.mi.us/ 
  (Michigan State Government)