Matt Damon has spoken about his disappointment in President Obama.

The actor voiced his opinion about the US presidential campaign to journalists at the Comic-Con convention in San Diego, where he was promoting the sci-fi thriller Elysium.

"I'd be shocked if Romney won," he said.

Damon added: "You know, I think Obama is the clear choice. But, and I've said before, I'm really disappointed in him. And I am. Particularly because of the banking stuff.

"You have real, real problems. If people feel like the deck is stacked against them, then they stop playing by the rules. Because why play by the rules? The game is fixed, right?"