Anyone who thinks a guy who went to the Soviet Union and Cuba during the cold war and advocated for how great they were is going to have an easy time in a general campaign has drank the kool aid. That's not to dismiss him, as I think he'd still win as well. But he'd have a much harder time than his supporters here seem to think.
Not that much harder. I mean their #1 issue is his "Socialism" and that was already played out against Obama and didn't work. And this came from folks who genuinely hated Socialism whereas Trump will be in no position whatsoever to criticize Sanders for promoting socialistic ideas. After all,
he admires Canada's health care system, he also
supports the Buffeft rule in which wealthier folks should pay more taxes, and he
doesn't think wealthy people should get social security.
Then you have the fact that numerous prominent Republican figures have come out and praised Sanders for being genuine and honest. Only 4% of Republicans and 35% of Independents think Hillary is
honest and trustworthy, compared to 37% (R) and 56% (I) for Sanders. Bernie also has a 5 point lead among Democrats as well.
So if Trump wants to flip the table and suddenly go after Sanders' character, well, good luck with that. To this day the only thing I've seen against Sanders that could remotely be construed as a knock against his character is his presumed intentions to "steal" the election by persuading superdelegates to change their minds "no matter what."