Barack Obama’s 2012 campaign manager is warning that Democrats would struggle in a general election against Donald Trump if Bernie Sanders is the nominee.

In an interview with POLITICO, Jim Messina predicted that 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.

“If I were a campaign manager for Donald Trump and I look at the field, I would very much want to run against Bernie Sanders,” Messina said. “I think the contrast is the best. He can say, ‘I’m a business guy, the economy’s good and this guy’s a socialist.’ I think that contrast for Trump is likely one that he’d be excited about in a way that he wouldn’t be as excited about Biden or potentially Mayor Pete or some of the more Midwestern moderate candidates.”....

“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.”

Messina is the latest Democrat to raise concerns about Sanders at the top of the ticket. Endangered House Democrats are coalescing around Biden because of concerns that Sanders or Elizabeth Warren could threaten their reelection hopes, POLITICO reported Saturday.