When President Donald Trump was rallying in Great Falls, Montana in July, he said he would give Sen. Elizabeth Warren $1 million to put toward the charity of her choice.

The one condition for Trump's offer being that Warren take a DNA test to prove her heritage, as the senator recently announced she has.

Now Warren is asking Trump to keep good on his word and donate $1 million to the National Indigenous Women's Resource Center, a nonprofit organization that addresses domestic violence against women and children within Native tribes.

On Monday, Trump denied ever saying he would give Warren $1 million, telling reporters, "I didn't say that. You'd better read it again."

By the way, @realDonaldTrump: Remember saying on 7/5 that you’d give $1M to a charity of my choice if my DNA showed Native American ancestry? I remember – and here's the verdict. Please send the check to the National Indigenous Women’s Resource Center: https://t.co/I6YQ9hf7Tv pic.twitter.com/J4gBamaeeo — Elizabeth Warren (@ewarren) October 15, 2018

This week, Senator Elizabeth Warren shared the results of a DNA test she took in August which found that 6-10 generations ago, Warren had a Native American ancestor.

The DNA test, conducted by genome expert and Stanford University Professor Carlos Bustamante, revealed Warren's DNA showed "primarily European descent" with traces of Native American ancestry.

At the July 5 rally in Great Falls, Trump mused that if he sparred against Warren in a presidential debate, he would toss her a heritage kit.

"I promise you I'll do this, you know those little kits they sell on television for $2? Learn your heritage," Trump said in Montana.

"We will take that little kit, we have to do it gently because we're in the 'Me Too' generation, we have to be very gentle," Trump said.

"And we will say, 'I will give you a million dollars, paid for by Trump, to your favorite charity if you take the test and it shows you're an Indian," Trump said. "And we'll see what she does. I have a feeling she will say no but we will hold it for the debates," Trump added.