Sen. Elizabeth Warren, D-Mass., touting a DNA test Monday that revealed she has a tiny amount of American Indian ancestry, reminded President Donald Trump of the $1 million he talked about giving to charity if she were to present proof of such a heritage.

“Remember saying on [July 5] that you’d give $1M to a charity of my choice if my DNA showed Native American ancestry?” Warren tweeted at Trump after she released the results of the DNA test. “I remember–and here’s the verdict. Please send the check to the National Indigenous Women’s Resource Center.”

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The results show Warren is somewhere between 1/64th to 1/1,044th Native Indian, going back six to 10 generations.

When a reporter asked him about the $1 million donation Monday, the president brushed it off.

“I didn’t say that, you better read it again,” Trump said.

Warren was referring to Trump’s comments during the July 5 rally in Great Falls, Montana, about debating her if she is a potential Democratic rival in 2020 , The Washington Post reported.

“I’m going to get one of those little [DNA testing] kits and in the middle of the debate, when she proclaims she’s of Indian heritage … ,” Trump said. “And we will say, ‘I will give you a million dollars to your favorite charity, paid for by Trump, if you take the test and it shows you’re an Indian.’”

“Let’s see what she does,” Trump continued, according to the Post’s account. “I have a feeling she will say no, but we’ll hold that for the debates.”

“Do me a favor,” he quipped. “Keep it within this room?”

Warren continued to take swipes at the president on Twitter over the DNA test.

“I took this test and released the results for anyone who cares to see because I’ve got nothing to hide. What are YOU hiding, [President Trump]? Release your tax returns–or the Democratic-led House will do it for you soon enough. Tick-tock, Mr President,” Warren tweeted.

Some see Warren’s decision to release the DNA test results as a precursor to a 2020 run for president; CNN moved her up to No. 1 on its list of Democratic contenders after she made the results public.

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