Lloyd Blankfein mocked Elizabeth Warren’s claim of Native American heritage on Thursday after she called him and other billionaires out for greed in a new ad — cracking that “maybe tribalism is just in her DNA.”

“Surprised to be featured in Sen Warren’s campaign ad, given the many severe critics she has out there. Not my candidate, but we align on many issues. Vilification of people as a member of a group may be good for her campaign, not the country,” Blankfein, the former Goldman Sachs senior chairman, tweeted.

“Maybe tribalism is just in her DNA,” Blankfein said of Warren, who has pushed for higher taxes on the wealthy.

President Trump regularly demeans the Massachusetts Democratic senator as “Pocahontas” over her claims, which she said were based on family lore, of Indian blood.

Blankfein, 65, was firing back over Warren’s most recent campaign ad, which aired on CNBC Thursday and targets him and other billionaires who have ripped her proposal for a tax on the wealthiest Americans.

The ad singles out investor Leon Cooperman, former Ameritrade CEO Joe Ricketts, Blankfein and investor Peter Thiel — billionaires all.

“It is time for a wealth tax,” Warren declares in the ad, which pictures her at a campaign rally on a stage in a high school gym as students cheer.

“I’ve heard there are some billionaires in America who don’t support this plan,” she adds with mock incredulity before identifying four.

Warren’s also selling new $25 campaign mugs imprinted with the words “Billionaire Tears.”

Warren eventually took a DNA test that showed she possibly had a small fraction of Native American blood, but in August she scrubbed references to her Cherokee heritage from her website and apologized.