Democrats won a 67-51 majority in the 1992 elections.
The next year, however, was a national Republican wave and it gave the GOP control of the Illinois House with a 64-54 majority.
In two states, politician commissions draw congressional district lines.
State legislative district lines are primarily the province of the state legislatures themselves in 37 states.
Legislative authority and responsibilities of the Illinois House of Representatives include passing bills on public policy matters, setting levels for state spending, raising and lowering taxes, and voting to uphold or override gubernatorial vetoes.
This page contains information on the Illinois House of Representatives that is curated and updated by Ballotpedia staff.
In 2016, Republicans broke the Democratic supermajority when they won 51 seats.
From 1992 to 2016, the Illinois House of Representatives mostly stayed in Democratic hands, although it did trend toward Republicans during national GOP waves and changed partisan control in 1994.The Illinois General Assembly is responsible for drawing both congressional and state legislative district lines.Both chambers of the state legislature must approve a redistricting plan.The governor may veto the lines drawn by the state legislature.In the event that both chambers of the state legislature do not approve a legislative redistricting plan, a backup commission must draw the lines.In seven states, politician commissions draw state legislative district lines.In the remaining six states, independent commissions draw the lines.State law also mandates the establishment of state legislative districts "that allow racial or language minority communities to elect--or influence the election of--the candidates of their choice, even if no comparable district would be required by the federal Voting Rights Act." Following the completion of the 2010 United States Census, Illinois lost one congressional seat.At the time of redistricting, Democrats held majorities in both chambers of the state legislature.From 2009 to 2017, Democrats experienced significant losses in state legislative elections, totaling 968 seats all together.In 37 states, legislatures are primarily responsible for drawing congressional district lines.