Almost a year into their new job, most have been largely successful. But some are struggling to lead.
Giving up on the gridlock at the federal and state levels, progressives are turning their attention to local ballots to get their ideas passed. But policies that sell well in cities won't always work statewide.
The issue has reached courts and legislatures in many states, but there's no national consensus on the legality of taking a photo of a completed ballot and posting it on social media.
Most incumbents are safe bets for re-election, but races remain unpredictable in several big cities.