She added that the campaign is actually adding people to the staff in Iowa and other key states.

Her poll numbers dwindling, Bachmann has fought against the perception that her campaign is running out of steam and that disappointing fundraising results were requiring her to conserve resources by slimming down the campaign payroll. The campaign has not yet released results from the third fundraising quarter, which ended Sept. 30, but those results must be made public by the middle of October.

A Quinnipiac University poll released Tuesday showed Bachmann garnering only 3 percent of the vote, behind Mitt Romney, Herman Cain, Rick Perry and even Sarah Palin, who is not a declared candidate.

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But Bachmann's numbers have stayed relatively consistent in Iowa since she won straw poll the same day Perry entered the race. In the weeks since, Bachmann had focused with laser intensity on Iowa, which holds the first primary contest of the season, but is working to develop an infrastructure in other early-voting states including New Hampshire and South Carolina.

"We're competing in all of the early states," Stewart said. "We've got a heavy focus on Iowa but we're looking at competing well in all the early states, and we're going to distribute our time as equally as possible."

Bachmann's bus tour will include town hall meetings and a Tea Party event and culminate with Tuesday's Bloomberg/Washington Post debate for GOP presidential candidates.

- This post was updated at 3:37 p.m.