Wonder if this was before or after he was heckled….
Check it out:

A fired up President Barack Obama had a message to immigration activists at a dinner this evening in Washington, D.C.: “no force on earth can stop us.”

“The clearest path to change is to change [the voter turnout] number,” said Obama “Si se puede, si votamos! Yes, we can, if we vote!”

“You know, earlier this year, I had a chance to host a screening of the film Cesar Chavez at the White House, and I was reminded that Cesar organized for nearly 20 years before his first major victory. He never saw that time as a failure. Looking back, he said, I remember the families who joined our movement and paid dues long before there was any hope of winning contracts. I remember thinking then that with spirit like that, no force on earth could stop us.