The former Goldman Sachs CEO is one of several billionaires and financial industry moguls who have taken a heel turn in the Democratic primary, which features multiple candidates who have reveled in criticism from Wall Street-types amid an effort to make populist appeals to working class voters.

Both Sanders and Blankfein have relished their slap fight: Sanders included the financial mogul last summer on a list of "anti-endorsements" of his presidential bid, while Blankfein snarked on Twitter after Sanders' win in the New Hampshire primary that the Kremlin might consider interfering on the Vermont senator's behalf in the presidential election because he was the candidate “to best screw up the US.”

And on Friday, it didn't take long before Sanders responded to Blankfein's concern with glee. "I welcome the hatred of the crooks who destroyed our economy," he wrote in a tweet.

Blankfein later replied to Sanders, saying he doesn't have "hatred for" the senator — rather he strongly disagrees with his policies.

"Perhaps the Sen wants to feel hated because HE hates. This time around, how 'bout picking someone who'll respect and work with all groups?" Blankfein wrote.

On policy, Blankfein railed against Sanders' backing of a wealth tax, an idea that multiple Democratic White House hopefuls have also endorsed.

“I don’t like that at all,” he said in the Financial Times interview, likening it an "assassination by categorization."

"I think it’s un-American. I find that destructive and intemperate. I find that just as subversive of the American character as someone like Trump who denigrates groups of people who he has never met. At least Trump cares about the economy,” he argued.

More generally, Blankfein argued in the interview that Democrats are hurting themselves by not acknowledging the economic growth that Trump has overseen.

“Look, it’s crazy not to acknowledge the economy has expanded under Trump,” Blankfein said, attributing the growth in part to the 2017 GOP tax law and Trump’s elimination of “dopey regulations.”

“All I’m saying is that Democrats would have a far stronger case if they conceded what was good,” he contended.

Blankfein also registered his disagreement with the fatalistic rhetoric used by Democrats during Trump’s impeachment proceedings, which had concluded days earlier with the president’s acquittal at the time of the interview.

Asked about former New York Mayor Mike Bloomberg, who’s self-funded White House campaign has climbed in the polls on the strength of a multimillion dollar advertising blitz, Blankfein seemed much warmer to the idea of casting his ballot for that New York billionaire.

“I know Mike, I was a customer of his [for Bloomberg terminals],” he said. “I played golf with him. I like him and admire him. We are lucky Mike is paying the personal price of running.”