Now that Congress has cut a deal to skirt the Jan. 1 “fiscal cliff,” lawmakers face another deadline in March when the government is expected to exhaust its authority to keep borrowing money.  President Obama has said he’s not interested in negotiating with Congress over increasing the nation’s $16.4 trillion debt limit.  The last time such negotiations took place, in August 2011, the government almost defaulted before a deal was struck.  One rating agency cut the nation’s credit rating as a result.  But now GOP leaders in Congress say they won’t be willing to raise the debt ceiling unless the president agrees to deep spending cuts.  Should Republicans stick to their guns -- even it risks a default?  Or should they find other, less risky ways, of seeking spending cuts?  Who do you think will blink first this time: Republicans or the president?