Chris Carlson, Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop at Homer's Deli and Bakery in Clinton, Iowa, Wednesday, Dec. 28, 2011.

CEDAR FALLS, Iowa — Mitt Romney is airing an optimistic new ad in Iowa during the last days before the caucuses.

The minute-long TV ad, released Thursday, shows clips from Romney's presidential campaign announcement speech in June. In the spot, Romney talks about the "spirit of enterprise" and focuses on the opportunities America has provided its people.

The ad is part of Romney's final push ahead of the Jan. 3 caucuses and he has launched a late push to win. Polls are showing him in a strong position to finish first or second. Romney is in the state on the second day of a bus tour across eastern Iowa.