Pocahontas was a historical 17th century figure, long famous in US pop culture, but who has been turned by Trump into a jibe against Warren that he often repeats to laughter from the crowds at his campaign rallies.
Warren -- touted as a likely Democratic challenger to Trump in 2020 -- thought she'd put the matter to bed on Monday when she released a DNA test showing she does indeed have a sliver of Native American heritage.
But Trump, who once promised to pay $1 million to charity if Warren could ever prove her claim, savaged the senator again Tuesday in no less than three early morning tweets.
"Pocahontas (the bad version), sometimes referred to as Elizabeth Warren, is getting slammed. She took a bogus DNA test and it showed that she may be 1/1024, far less than the average American," he said.
He pointed out that the Cherokee Nation tribe -- which Warren has said an ancestor belonged to -- had rejected the relevance of her DNA claim, saying a "DNA test is useless to determine tribal citizenship."