Rolling through eastern Iowa - including a Tuesday night stop in Bettendorf, Michele Bachmann took aim at her rivals as she worked to win the support of "values voters."

"The people of Iowa are looking for the one, true, core conservative in this race," she said outside the Falcon Civic Center in Independence.

"They need to know who it is that will represent them and their values. They want to make sure their nominee will be someone who will look out for their interests and not their own personal interests."

Those words do not, Bachmann said, describe fellow 2012 GOP nomination competitors Mitt Romney or Newt Gingrich, who she called "compromise candidates."

Tuesday night, Bachmann's campaign bus - with Christmas music playing - arrived at the Bettendorf home of congressional hopeful John Archer, who was hosting a house party. About 150 people gathered to hear her. Just 10 minutes earlier, another candidate, Rick Santorum, had appeared before the gathering.

Bachmann greeted each person at Archer's home, shaking hands and wishing them a Merry Christmas.

Standing before a fireplace and a bright, 15-foot Christmas tree, Bachmann told the crowd she can meet the challenges that face the nation, including improving the economy and national security.

During her Quad-City stop as well as at appearances in DeWitt, Fayette, Postville, Strawberry Point, Manchester and Dubuque, Bachmann billed herself as the "authentic voice" and encouraged her supporters to make their voices heard in the Jan. 3 first-in-the-nation precinct caucuses.

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"I am an Iowan," the Waterloo native said. "I am not a part of Washington. I am a part of the voice of Iowa."

In appearances throughout the day, Bachmann called for the repeal of Obamacare and the tax code, securing the border against illegal immigration, and ramping up energy exploration and production - including building the Keystone XL pipeline - so the price of gas at the pump will return to $1.79 a gallon, the price it was the day President Barack Obama took office.

As a member of the House Intelligence Committee, Bachmann said she is the strongest candidate on national security issues. She ripped U.S. Rep. Ron Paul of Texas for his non-interventionist foreign policy and unwillingness to defend Israel from Iranian aggression.

(Thomas Geyer contributed to this story.)