Nearly 14.6M people voted in contested Democratic House primaries this year, more than 2.5 times as many as voted in such races in 2014 (fewer than 5.6M). Turnout in contested Republican House primaries rose too, but less so than in the Democratic races. https://t.co/7x5OE7BnxH pic.twitter.com/hBTgkcezn8
— Pew Research Fact Tank (@FactTank) October 6, 2018