The 2018 midterm elections brought significant gains for Democrats, who retook the House of Representatives and snatched several governorships from the grip of Republicans.
But some were left questioning why Democrats suffered a series of setbacks that prevented the party from picking up even more seats and, perhaps most consequentially, left the US Senate in Republican hands.
Among the most eye-catching was a statistic showing Democrats led Republicans by more than 12 million votes in Senate races, and yet still suffered losses on the night and failed to win a majority of seats in the chamber.