Hillary Clinton is blasting Donald Trump's "ludicrous" claim that she was the first to question President Barack Obama's birthplace.
Trump tweeted the claim on Tuesday night: "Just remember, the birther movement was started by Hillary Clinton in 2008. She was all in!"
In 2008, rumors sparked that Clinton supporters were swapping email chains raising questions about Obama's heritage.
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"This is so ludicrous," Clinton told Don Lemon, who asked her about the 2008 claims.