The most vulnerable 2020 House and Senate incumbents, explained

One year out from Election Day 2020 and Senate Republicans and House Democrats find themselves in parallel universes. The GOP is on defense in Senate races, where more Republicans are on the ballot, and it's the opposite in the House, where many Democrats who won in hostile territory in 2018 find themselves in tough races. CQ Roll Call’s campaign team, Simone Pathé, Bridget Bowman and Stephanie Akin, run through the 10 most vulnerable members of both the House and Senate. Learn more about your ad choices. Visit megaphone.fm/adchoices