In 2020, Republicans are optimistic about winning back districts that they lost to House Democrats after the 2018 elections, but President Trump won in 2016. There are 31 of these districts, and the GOP needs 18 to win back the House. That gives the GOP room to work with to achieve their target, but Democrats have a lead in appealing to the demographics that helped them gain control of the House.
In the 2018 Congressional race, the Democrats were able to capture nearly all the previously Republican-held seats that Hillary Clinton carried in 2016. There were 25 of those districts, and Republicans were only able to defend two of those seats. There is a trend that shows Democrats won the House in 2018 because they appeal to those in suburban areas, women, minorities, and youth.