Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE no longer believes President Obama was born outside of the United States, ally Rudy Giuliani claimed Thursday.

ADVERTISEMENT

Giuliani, a former New York City mayor who has been advising the Trump campaign, said the Republican presidential nominee no longer questions Obama's citizenship.

“I confirm that and Donald Trump now confirms that,” Giuliani said on MSNBC. “Donald Trump believes now that he was born in the United States.”

Giuliani said Trump is also "proud" for pushing Obama to release his birth certificate.

“He has told me that he is proud of the fact that he finally got Obama to produce his birth certificate,” he said.

Trump launched the so-called "birther" movement in 2011 when he began insisting Obama was born in Kenya.

When the White House released Obama's birth certificate, Trump questioned its authenticity. As a presidential candidate, Trump has mostly declined to comment on the controversy, but Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE has used it to accuse the mogul of trying to de-legitimize the first black president.