Hillary's VP will be Julian Castro. Drumpf's VP would be his Pet Dog and Political Prisoner Chris Christie. Romney's VP would be Rubio for staying in and keeping Drumpf away from the needed Delegate count.
Hillary V Drumpf will be a blowout of 10+ points. Not sure which way, however, but confident it won't be close. Drumpf is a total wild card in every way. One of their messages will catch on big time, one won't. Either or both could be campaigning from a jail cell. The turnout's will be more anti the other one, than pro who you're voting for. 3rd Party(s) will get at least 5% of the vote because of how unattractive both major candidates would be.
Hillary V Romney would be very close, and I think Romney would win. Less Negatives than Hillary.