Just days before the Democratic Convention, four high-profile candidates have ended their bids to unseat Senator Susan Collins. Maine Democrats to Choose a New Candidate for U.S. Senate After Platner's ExitEarlier this month, Graham Platner, who was the Democratic Party's nominee to take on Collins in November, withdrew from the race amid allegations of sexual impropriety. A wide field of candidates threw their hats back in the ring, hoping to become Maine's next Democratic nominee for the U.S. Senate. READ MORE: 25 Gorgeous Photos that Show Maine is One Giant PostcardBut now, that field has been narrowed, as four of the most high-profile candidates withdrew from the race in the last few days, a week before the Democratic Convention. Get our free mobile appDan Kleban and Jordan Wood also announced their withdrawals from the race.