The Republicans Have Made an Art of Shrinking Democracy, Gerrymandering a Case in Point:
"Republican legislators have vigorously and successfully used underhanded tactics to gain majorities in statehouses and Congress, even when the majority of statewide votes are Democratic. Although the GOP employs many strategies to suppress non-white voting, its most successful tool has been gerrymandering. After the national Census, state legislatures are responsible for carving up state legislative and congressional districts. In 2010, the cast was set, according to a revealing article in Salon about the way in which Republicans worked to ensure a majority in most statehouses and in Congress: It [the redistricting strategy] proved more effective than any Republican dared dream. Republicans held the U.S. House in 2012, despite earning 1.4 million fewer votes than Democratic congressional candidates, and won large GOP majorities in the Ohio, Wisconsin, Michigan and North Carolina state legislatures even when more voters backed Democrats. By diluting the Democratic vote in several districts, while drawing the district lines to include more Republicans, an artificial majority can be created that mocks democracy."
