GOP presidential front-runner Donald TrumpDonald TrumpClinton mocks Trump with her own 3 a.m. tweetstorm Clinton’s strategy: Get under Trump’s skin Trump: 'I'm considering' going after Clintons' marriage MORE on Monday called Sen. Elizabeth WarrenElizabeth WarrenWarren questions Puerto Rico board's meeting on Wall Street Overnight Finance: Lawmakers float criminal charges for Wells Fargo chief | Scrutiny on Trump's Cuba dealings | Ryan warns of recession if no tax reform Anti-trade senators say chamber would be crazy to pass TPP MORE (D-Mass.) an “Indian,” mocking her for an old claim of Native-American ancestry.
Earlier in the day, Warren went on a Twitter rant against Trump, calling him a "loser" and a "serious threat" to the United States.
“You mean the Indian?” Trump asked when a reporter inquired about the senator's comments during a press conference in Washington, D.C. “Who’s that? The Indian?”
“The problem with this country right now is it’s so divided,” he said. "People like Elizabeth Warren really have to get their act together because it’s going to stay divided."
“That includes Hillary,” Trump continued. "And that probably includes me."
Warren met with controversy during her 2012 Senate campaign when reports emerged that Harvard Law School once touted her alleged Cherokee and Delaware ancestors as proof of its faculty’s diversity.