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A Republican who's running for Sen. Elizabeth Warren's (D-MA) Senate seat is taking aim at her claims that she has Native American heritage.

Warren has never provided any documentation that she is Native American, instead pointing to "family stories" passed down to her through generations as evidence.

President Trump infamously dubbed her "Pocahontas" and accused her of falsely claiming Native American heritage.

Now, Republican senatorial candidate V.A. Shiva Ayyadurai is calling Warren out for refusing to take a DNA test.

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Last week, Ayyadurai, an Indian-American entrepreneur, sent Warren an all-expenses-paid DNA test kit from 23&Me via Amazon.

On Sunday, Ayyadurai took to Twitter to say he was "deeply saddened" by Warren's refusal to accept his "thoughtful gift."

Ayyadurai is running on the slogan: “Only a real Indian can defeat the fake Indian.”

Watch the "Fox & Friends First" report above.

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