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President Donald Trump said Thursday that Sen. Elizabeth Warren has "got to take a drug test" when asked to respond to her claims of him trying to cut Social Security.

Trump made the remark during an event at the White House celebrating the 90th anniversary of the Social Security Act, where the president said he would strengthen the program "for generations to come."

"It's so vicious what they do. Elizabeth Warren said she was an Indian. We call her Pocahontas. She's a liar. She lied her whole career," Trump said. "Based on the fact that she was an Indian, she was able to get into certain colleges, get certain jobs, get into certain universities to work there. And she's a liar and a mean person.

"She's a nutjob. I watch

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