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.”

This is not the first time Messina has questioned Sanders’ viability as a general election candidate. His latest remarks come amid Sanders’ first-place showing in the marquee Iowa Poll and as the Vermont senator‘s messaging has increasingly focused on his electability.