Trump would exploit Sanders’ stamp of socialism in battleground states needed to defeat Trump, keep control of the House and have a shot at winning the Senate.

…“From a general election perspective, socialism is not going to be what Democrats are going to want to defend,” Messina added.“If you’re the Democratic nominee for the Montana Senate race, you don’t want to spend the election talking about socialism.”

…Sanders would not be able to help Democrats in states like Arizona and North Carolina if they’re to defeat Trump.

“My concern about Sanders would be just how low his ceiling may be,” the adviser said. “The argument Sanders would make is he can turn out tough-to-turn-out voters. While many are very progressive like the Sanders base, most aren’t, most aren’t connected to politics, they tend to be more moderate,” the adviser said. “I think it’s a falsehood that all the people not registering to turn out are looking for the most classically liberal candidates — that’s just not true.”

Obama campaign guru: Trump would love to run against Bernie – POLITICO

hmmmm