Donald Trump dominates debate but refuses to rule out independent run

Republican frontrunner starts off showdown by refusing to make a pledge not to run third-party campaign and fending off accusations of misogyny A defiant Donald Trump dominated the first Republican presidential debate on Thursday - electrifying the event from the start by refusing to rule out running as an independent if he failed to get the party's nomination. Related: Trump responds to Megyn Kelly's questions on misogyny - with more misogyny