Salena Zito

An NBC-Marist poll released on Friday showed Romney and Texas Rep. Ron Paul virtually tied for the lead among likely caucus-goers. It put former Pennsylvania Sen. Rick Santorum in third place and Perry in fourth. Gingrich was sliding to fifth from the lead he held only weeks ago. Minnesota Rep. Michele Bachmann fell to the bottom of the pack.

Perhaps more striking, Tea Party supporters are essentially divided among the field.

"This is not an election just to change presidents, it's an election to save the soul of America," Romney said in a speech at Kinzler Construction Co. in Ames. At Centro Inc., a plastics manufacturer in North Liberty, he emphasized that "government doesn't create jobs; the American people create jobs."

Romney's campaign in Iowa was solid, yet low-key, building upon a network of goodwill he earned in his second-place showing in 2008. His trusted consultant, Dave Kochel, and a few staffers grew that base into a grassroots organization that has kept voters engaged. In the final stretch, when demeanor counts, Romney is keeping his message positive.

Contrasting Romney's elegant rise is Bachmann's messy fall. She last enjoyed front-runner status the day before winning the nonbinding Ames straw poll, an August fundraiser for the state party. Perry overshadowed her win that day by announcing in North Carolina that he would run. This past week, Bachmann's Iowa campaign lost its chairman, Kent Sorenson, and political director, Wes Enos.

With voters, she compares herself to former British Prime Minister Margaret Thatcher. "I am the Iron Lady," she said at Legends, a family restaurant in Marshalltown.

That may well be, said Irv Vaske, 79, who sells "green" chemical products, but it's not likely to propel her first past the finish line -- especially since Bachmann spent more time with cable TV talk show interviews than voters who came to see her.

"I love her and her message, but I am going to go with a winner," Vaske said. He hasn't decided who that might be.

"Maybe Santorum," he said.

Santorum won over Mark McQueen, 48, a farmer who went to a Gingrich event in Carroll to "make sure Newt's my guy." He decided instead that Santorum "is the real deal."

Santorum, who completed a 99-county visit across Iowa, told the Trib that he's "connecting with voters on a level that none of the others are."

Yet, said Lara Brown, an expert on presidential elections at Villanova University, Republican voters in Iowa and elsewhere appear more interested in experience and electability than Santorum's ideological purity. They are gravitating to Romney, she said, because "voters are looking towards the steady candidate."

Salena Zito

Salena Zito is a political analyst, reporter and columnist.