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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.
They ended up with a 71-47 majority, which was enough for a three-fifths supermajority that could override gubernatorial vetoes.
Democrats maintained their supermajority in the 2014 elections, despite the national trend toward the Republicans that year.
The next year, however, was a national Republican wave and it gave the GOP control of the Illinois House with a 64-54 majority.On May 30, 2011, the Illinois House of Representatives approved a congressional redistricting plan.The Illinois State Senate approved the plan on May 31, 2011, and Governor Pat Quinn (D) signed it into law on June 24, 2011.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.