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The recent personal data hack of the Ancestry site has hit Chelsea Clinton, possibly harder than anyone else.The former First Daughter has denied for decades that Webb Hubbel is her biological father, but those days are over.The Ancestry database shows a voluntary DNA submission from Clinton in 2018 that shows she's a 99.7 percent genetic match to Hubbel and his family line.The mitochondrial DNA, passed down to females only, is a 100 percent match.Clinton's PR team claims the hacked data is "compromised."