Platner's exit leaves Democrats scrambling to field a new candidate to take on Senator Susan Collins.

Operatives in D.C. and Maine are floating four names to take on Susan Collins as calls grow for the progressive oysterman to exit the race.

Operatives in D.C. and Maine are floating four names to take on Susan Collins as calls grow for the progressive oysterman to exit the race.

Platner has until July 13 to withdraw his bid to unseat Sen. Susan Collins (R-ME), which would give the state party until July 27 to select a new nominee.