5. Republicans no longer have a single House seat in New England

Following Democrat Jared Golden's victory over Rep. Bruce Poliquin in Maine's 2nd district on Thursday, Republicans now hold zero House seats in New England and only one Senate seat — Maine's Susan Collins, who's up for re-election in 2020.

The big picture: Republicans lost big in moderate suburban districts in the 2018 midterms and even ceded ground in deep-red rural districts that voted for Trump in 2016. The flip in Maine's 2nd blue-collar district "filled with forests, lobsters, and blueberries," could be an indicator that the GOP's shift to the right has alienated moderate Republicans in the northeast, the Boston Globe writes.

Go deeper:

• Democrats flip another House seat, this time in Maine
• The districts with college-educated women that voted Republicans out
• Full list: 2018 midterm election seats that flipped
• Suburban districts moved toward Democrats in 2018