DES MOINES, Iowa - Holding his final event before tonight's caucuses, Mitt Romney remained focus on criticizing President Obama, declaring "he's out."

Repeating a line he uses often on the stump, Romney said he is ready to "collect" on remarks made by Obama at the beginning of his presidency, when he said that he'd be a one-term president if he were unable to turn the economy around.

Joined by four of his five sons and his wife, Ann, Romney held a rally in downtown Des Moines, where a crowd of about 100 was dwarfed by a crush of media: foreign, national and local press.

"The president said he fundamentally wants to transform America," Romney said. "I don't want to transform America, I want to restore the principles that made America. This is the America we love and I'm going to make sure we take those principles to the White House and get America working again."

Ann Romney also spoke about how excited she is about tonight and the rest of the campaign.

"Thank you all and thank you all for coming this morning," she said. "This is a great day, this is an exciting day. I'm thrilled that you're all there and I'm thrilled that some of you will be going out and doing your civic duty tonight. How great is our country and how much do we all love it."

Speaking to reporters after the event, Romney seemed confident about his chances in Iowa.

"You know, I think it's going to be a good day for probably about three people," he said. "I hope, I think I'll be one of them.

"I think I'll be one of the three and everybody would like to be at the top of three. But being one of the three would be terrific."

Romney will not hold anymore campaign events before tonight's caucuses and will spend the day with his family.