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Elizabeth Warren releases results of DNA test

The analyst concluded that “the vast majority’’ of Warren’s ancestry is European, but he added that “the results strongly support the existence of an unadmixed Native American ancestor.’’

According to family lore, Senator Elizabeth Warren’s great-great-great-grandmother was at least partially Native American. –Essdras M Suarez for the Boston Globe/File

WASHINGTON — Senator Elizabeth Warren has released a DNA test that provides “strong evidence’’ she had a Native American in her family tree dating back 6 to 10 generations, an unprecedented move by one of the top possible contenders for the 2020 Democratic nomination for president.

Warren, whose claims to Native American blood have been mocked by President Trump and other Republicans, provided the test results to the Globe on Sunday in an effort to defuse questions about her ancestry that have persisted for years. She planned an elaborate rollout Monday of the results as she aimed for widespread attention.

The analysis of Warren’s DNA was done by Carlos D. Bustamante, a Stanford University professor and expert in the field who won a 2010 MacArthur fellowship, also known as a genius grant, for his work on tracking population migration via DNA analysis.

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