Platner decisively won the Democratic Maine Senate primary Tuesday despite a string of controversies.

Maine’s Republican-held Senate seat is one of three Senate contests rated as toss-ups this year.

As voters head to the polls in Maine, some are worried about Senate candidate Graham Platner’s scandals. Others dismiss them as establishment meddling.

Graham Platner, the Democratic nominee for Senate in Maine, fired back at critics Wednesday after winning the primaries.

The president heartily attacked Platner on Wednesday following the latter's victory in Maine's Democratic Senate primary.