House Budget Committee Chairman Rep. Paul Ryan ( R-Wis.) leaves a Republican caucus on Capitol Hill earlier this month. (Jacquelyn Martin/AP)

WILLIAMSBURG, Va. -- House Republicans are weighing a plan to raise the nation's legal borrowing limit for just a few months, a move that could shift debate over the debt ceiling into March, when Congress will face other major fiscal decisions, Rep. Paul Ryan (R-Wis.) said Thursday.