Romney is airing a new ad in Iowa ahead of the Ames straw poll this weekend.
"Washington politicians in both parties have proven they can't control spending, and they won't control our borders," the former Massachusetts governor says in the new ad. "I will, but I need your help to do it.
"So come on to Ames. After all, changing America always starts in Iowa."
Romney, who is seeking the GOP presidential nomination, is expected to win this historically significant contest on Saturday, but it has lost some of its luster because three of the top Republicans eyeing the GOP nomination have decided not to participate. Still, Romney's campaign could receive a boost if he is the clear winner in Saturday’s straw poll which is considered a test of field organizing.
Declared presidential candidates, former New York City Mayor Rudy Giuliani and Arizona Sen. John McCain, will not take part in the event nor will former Tennessee Sen. Fred Thompson, who continues to explore a White House bid.
In previous years, the Ames GOP straw poll helped thin out the field of Republicans seeking their party's nomination.
- CNN Political Editor Mark Preston