The twins offered President Obama's girls advice for life after the White House.
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President George W. Bush and Laura Bush's twin daughters Jenna, right, and Barbara, left, penned a heartfelt letter to Malia and Sasha Obama.
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The Bush sisters noted of the Obama girls, "We have watched you grow from girls to impressive young women with grace and ease."
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Jenna and Barbara recalled the relationships they made in the White House.
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