Sen. Elizabeth Warren Elizabeth WarrenGOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (D-Mass.) on Sunday shot back at Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE after the presumptive GOP presidential nominee said she needs to prove she's not a "fraud" and accused her of lying about her heritage.

"Nasty name-calling & lies about my family aren't going to shut me up, @realDonaldTrump," Warren tweeted.

"Is that really all you've got?"

Nasty name-calling & lies about my family aren’t going to shut me up, @realDonaldTrump. Is that really all you’ve got? — Elizabeth Warren (@elizabethforma) July 17, 2016

Warren then launched into a series of tweets in which she attempted to cast Trump as a fraud, citing a series of articles in which the presumptive GOP nominee has been accused of fraud regarding Trump University.

Pres Reagan's Solicitor General was the Harvard prof who hired me, @realDonaldTrump. He says your right-wing conspiracy theories are a lie. — Elizabeth Warren (@elizabethforma) July 17, 2016

It might blow your mind that a woman worked hard & earned a good job on her own, @realDonaldTrump, but it’s not the 1800s. It happens. — Elizabeth Warren (@elizabethforma) July 17, 2016

Warren ended her rant by calling Trump "nothing but a thin-skinned bully and a lousy, cheating businessman."

You’re nothing but a thin-skinned bully and a lousy, cheating businessman, @realDonaldTrump. The sham is over. — Elizabeth Warren (@elizabethforma) July 17, 2016

Warren has taken on an attack-dog role against Trump. On Saturday, she slammed Trump and his running mate, Indiana Gov. Mike Pence Michael (Mike) Richard PenceMcConnell locks down key GOP votes in Supreme Court fight Momentum growing among Republicans for Supreme Court vote before Election Day Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election MORE, calling the team, "two small, insecure, weak men."

Trump shot back Sunday morning, saying that presumptive Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE should choose Warren as her running mate so that "we can litigate her fraud." He said Warren would be "nothing" if she "didn't lie about her heritage (being Native American)."

Warren is reportedly on the shortlist to be Clinton's running mate. She met with Clinton on Friday in Washington, D.C., amid reports that Clinton is getting close to making a decision.