Donald Trump just couldn’t help himself.

After telling “Late Show” host Stephen Colbert on air Tuesday night that “I don’t talk about” President Obama’s birth certificate anymore, Trump later tweeted about it, claiming that former Obama rival Hillary Rodham Clinton was a birther before The Donald was.

Colbert asked Trump, “Barack Obama, born in the United States?” and the GOP presidential front-runner responded, “I don’t talk about that anymore.”

Trump then tweeted, “The birther movement was started by Hillary Clinton in 2008. She was all in!”

Just remember, the birther movement was started by Hillary Clinton in 2008. She was all in!

— Donald J. Trump (@realDonaldTrump) September 23, 2015