43% to 42%, a half million vote difference out of 70 million votes. George Wallace got 9.9 million (13.5%) and made the difference. Many of his votes were 'rats mobilized by the disgusting spectacle in Chicago and turned off to the 'rat party bosses. Not exactly winning big, but a win is a win.
A lot of the anti-war Democrats were mad at Hubert Humphrey but were slowly coming around—perhaps if the election had been a week or two later he would have beat Nixon.