Presidential nominee Hillary Clinton called Friday for rival Donald Trump to clearly repudiate his own history of questioning President Barack Obama's nationality.
Trump, a New York billionaire with little previous political participation, has long encouraged the "birther" movement that arose during Obama's 2008 presidential campaign, questioning whether he was born in the United States.
Clinton, in a Washington speech, said that Trump's campaign "was founded on this outrageous lie. There is no erasing it from history."
Obama was born in Hawaii. His mother was a Kansas native married to a foreign student from Kenya.
"Barack Obama was born in America, plain and simple. And Donald Trump owes him and the American people an apology," Clinton said.
Trump was due to speak on the issue Friday in Washington.