If President Barack Obama ever quits his day job, he could have a bright future as a soul singer.

The president opened his speech at Harlem's Apollo Theater Thursday night by channeling Al Green's 1971 classic tune, Let's Stay Together.

"To know that the Rev. Al Green was here," Obama said, pausing.

"I-I-I-I... am so in love with you," the president sang to the delight of his supporters.

"Those guys didn't think I would do it," he said, pointing off stage. "I told you I was going to do it. The sandman did not come out."

It wasn't clear if the president had rubbed the "Tree of Hope" stump before taking the stage.

Watch this video from The Associated Press, broadcast Jan. 19, 2012.