Tuesday marked an especially significant moment for Graham Platner, the embattled veteran and oyster farmer, who is fighting to rebuild his credibility in a campaign rocked by controversy.
Democrats are banking on a rare chance to regain ground in Iowa, a rural state that has repeatedly eluded them in recent years. Republicans, meanwhile, are grappling with a New Jersey congressman whose unexplained absence could put their already slim majority at risk.
Voters across Maine, Nevada, South Carolina and North Dakota head to the polls Tuesday for another day of primary elections in America, but much of the political world will be focused on Maine's high-stakes U.S. Senate contest.