Very, according to Chait:
Romney has been positively associated with "electability" because he is more electable than most of his rivals. But he is the one-eyed man in the land of the politically blind. Romney, by normal standards, is a terrible candidate. He is nowhere near as formidable as John McCain was four years before. … He may win – he probably will win if the economy dips back into recession – but he is a weak candidate who in many ways embodies the public’s distrust of his party.
PPP's latest backs up Chait:
It's not as if Obama's suddenly become popular. He remains under water with 47% of voters approving of him to 50% who disapprove. But Romney's even less popular, with only 35% rating him favorably while 53% have a negative opinion of him. Over the last month Romney's seen his negatives with independents rise from 46% to 54%, suggesting that the things he has to say and do to win the Republican nomination aren't necessarily helping him for the general. Obama's turned what was a 45-36 deficit with independents a month ago into a 51-41 advantage.