Congress declared a holiday truce in the budget wars Wednesday, sending President Barack Obama a blueprint for funding the government through 2015. But the next skirmish was already on the horizon: an election-year fight over the national debt.

The budget deal that passed the Senate on Wednesday amounts to a handshake agreement to avoid a government shutdown when a temporary funding measure expires Jan. 15. However, the accord does not address the need to raise the debt limit once again, setting up a potentially complicated confrontation in late February or early March.

That fight would come just months before midterm congressional elections. The GOP is deeply divided over tactics to deal with the debt, a core issue for the Republican base. Some conservatives are calling for another showdown, insisting on an additional round of spending cuts in exchange for granting the Treasury Department more borrowing authority to pay the nation's bills.