That means House Democrats would also need to make inroads into the two other large groups of vulnerable GOP seats. The third are the "blue-collar blues": mostly blue-collar, non-urban seats in blue states, where Trump almost without exception improved on Romney's performance. More distantly, the Democrats are also eyeing a few Republican-held blue-collar seats in purple and Republican-leaning states. But House Democrats were routed in these places in the 2010 and 2014 midterm elections under Obama, and almost all of these districts turned further toward Trump in 2016. To recapture the House, Democrats will likely need to do a considerable amount of both.

Source: CNN February 20, 2018 11:03 UTC