A woman who previously dated Maine Democratic Senate candidate Graham Platner said he drunkenly forced her to have sex after she told him to stop, according to a report published by US news site Politico on Monday, leading prominent supporters to pull their endorsements and throwing a must-win race for the party into turmoil.Mr Platner denied the allegation but has cancelled a handful of previously planned town hall events, and said he was considering the next steps for his campaign."Regardless of the inaccuracy of the reporting but mindful of the political reality it will inflict, we're taking the time to...