Most of the people on this board are too young to remember the election of 1968, but the Democratic Party then was in much the same shape that the Republican Party is today as far as being hopelessly divided. Anti-war insurgent Democrats led by Gene McCarthy & Robert Kennedy had already driven a sitting Democratic president out of office. A president who had just won a massive landslide with more than 60% of the vote just four years earlier. That, in itself, was unprecedented. Then Kennedy was assassinated and the power brokers strong-armed Humphrey...who had not run in a single primary...to the nomination. To top it off, Kennedy & McCarthy supporters were beaten in the streets of Chicago at the Democratic Convention.
There were massive numbers of Democrats who swore they would never vote for Humphrey. A month before the election, Nixon had a 15-point lead in the polls. In the closing weeks of the campaign, though, as those Democrats considered the possibility of a President Nixon, they slowly & grudgingly "came home". Nixon still pulled out a victory, but this was the final popular vote total:
Richard Nixon Spiro Agnew Republican........ 31,783,783 43.42%
Hubert Humphrey Edmund Muskie Democratic........ 31,271,839 42.72%
George Wallace Curtis LeMay American Ind........ 9,901,118 13.53%
15 points down at the beginning of October, Humphrey lost the popular vote by only 0.7%. Nixon proved to be the Great Unifier for the embittered Democratic Party. Hillary has the potential to be no less so this November. Sure, she seems to have everything going for her right now....but after what has already happened in the last six months, it would be foolhardy to think that there could not be more surprises in the next six months.
This is a ludicrous comparison as there was a viable thrid party candidate who took southern votes from Humphrey. You cant' compare 68 to today.