The decision by House Speaker John A. Boehner to scale back budget talks with President Obama unfolded as Republican presidential candidates were campaigning against any outcome that smacks of compromise, underscoring divisions in the party over whether to raise the federal debt limit.

The action by Mr. Boehner, which was announced Saturday night, illustrated just how difficult negotiations had become in this political climate to reach agreement on a sweeping plan to lower the deficit without an infusion of new tax revenues.

Representative Michele Bachmann of Minnesota seized on the issue and used the first television commercial of her campaign to highlight her opposition to raising the debt ceiling. She drew enthusiastic applause on Saturday as she amplified her position.

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