Story highlights The back-and-forth between the two is nothing new

The tweet comes after Warren called Trump's comments about a federal judge "racist"

Washington (CNN) Donald Trump on Saturday again took aim at Elizabeth Warren on Twitter, continuing the feud between the Republican presumptive nominee and Democratic senator from Massachusetts.

"Goofy Elizabeth Warren, sometimes referred to as Pocahontas, pretended to be a Native American in order to advance her career. Very racist!" Trump tweeted.

Goofy Elizabeth Warren, sometimes referred to as Pocahontas, pretended to be a Native American in order to advance her career. Very racist! — Donald J. Trump (@realDonaldTrump) June 11, 2016

Trump has repeatedly referred to Warren as "Pocahontas," referring to the senator's past claims about her Native American heritage.

JUST WATCHED Clinton, Trump and Elizabeth Warren spar on Twitter Replay More Videos ... MUST WATCH Clinton, Trump and Elizabeth Warren spar on Twitter 02:24

The two have traded barbs throughout the week. On Thursday, Warren -- who has emerged as perhaps the Democrats' most outspoken Trump combatant -- called Trump a "thin-skinned, racist bully" after he criticized a judge with Mexican heritage who is overseeing a lawsuit against Trump University.

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