President Obama was addressing same-sex marriage in a speech in the East Room of the White House when he was interrupted by a pro-immigration campaigner.
Obama seemed less patient than he has been in the past, telling the heckler, who called for a halt to all deportations, to leave.
"Hold on a sec," Obama said. "OK. You know what. Nah, nah, nah, nah, nah, nah. No, no, no, no.
"Hey, listen, you're in my house," he added, to cheers from the audience.
Here's the video of the exchange, courtesy of C-Span.