House and Senate on collision course over debt limit

House and Senate leaders were preparing separate backup plans Sunday to raise the federal debt limit after another day of intense negotiations failed to break a partisan impasse that threatens to throw the government into default next week.

The rival strategies left Congress poised to start this week locked in bitter and messy legislative warfare, even as jittery financial markets were set to open for the first time since House Speaker John A. Boehner (R-Ohio) abruptly abandoned debt-limit talks with the White House on Friday.

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