Although Democrats were able to gain control of the House of Representatives in the 2018 midterm elections, according to Salon, the effects of GOP gerrymandering has offset Democratic gains. Without gerrymandering, Democrats could have picked up about 16 more seats, according to an Associated Press study. In state legislative elections, gerrymandering could have helped the Republican party hold on to seven chambers.
"The AP examined all U.S. House races and about 4,900 state House and Assembly seats up for election last year using a statistical method of calculating partisan advantage that is designed to flag cases of potential political gerrymandering," the Associated Press reported. "A similar analysis also showed a GOP advantage in the 2016 elections."
The report continued, "The AP used the so-called “efficiency gap” test in part because it was one of the analytical tools cited in a Wisconsin gerrymandering case that went before the U.S. Supreme Court in 2017 and is part of a North Carolina case scheduled to be argued on Tuesday before the court. In that case, justices will decide whether to uphold a lower court ruling that struck down North Carolina’s congressional districts as an unconstitutional political gerrymander favoring Republicans."
The U.S. has long been plagued by the question of whether gerrymandering should be allowed. In 2017, the Supreme Court struck down gerrymandered districts in North Carolina because the lines diluted the votes of African Americans.
President of the Republican State Leadership Committee, Matt Walker, said he disagreed with the theoretical basis of the AP study.