The Post-ABC poll finds Democrats holding a 57 percent to 31 percent advantage among female voters, double the size of Democratic presidential nominee Hillary Clinton’s margin in the 2016 election. Nonwhite women favor Democrats by a 53-point margin, somewhat smaller than Clinton’s 63-point advantage over Trump in 2016. But white women have moved sharply in Democrats’ direction, favoring them over Republicans by 12 points after supporting Trump by nine points in 2016 and Republican candidates by 14 points in the 2014 midterm election, according to network exit polls.
Partisan loyalty is strong, with Republican and Democratic candidates garnering support from at least 9 in 10 of their fellow partisans, but self-identified political independents favor Democrats by a 16-point margin, 50 percent to 34 percent. The swing group has been decisive in three consecutive midterm election waves, backing Republicans by 19 points in 2010 and 12 points in 2014, but supporting Democrats by 18 points in 2006 as they retook control of the House.