Support for embattled Maine Senate candidate Graham Platner is cratering among Democrats, with one of his most prominent supporters calling on him to exit the race following a harrowing rape allegation. Rep. Ro Khanna, D-Calif., rescinded his endorsement and called on Platner to suspend his campaign following a bombshell Politico report detailing a rape allegation by Maine resident Jenny Racicot, 41, who previously dated the scandal-plagued candidate.