Obama Signs Tax Deal Into Law

President Barack Obama, joined by Republican and Democratic lawmakers, looks up after signing the bipartisan tax package that extends tax cuts for families at all income levels, during a signing ceremony at the Eisenhower Executive Office Building in the White House complex today in Washington. Aimed at helping to stabilize the recovering economy, the bill keeps in place tax cuts instituted by President George W. Bush for another two years. (AP Photo/J. Scott Applewhite)

Question: Is this the beginning of bipartisan cooperation between President Obama and congressional Republicans? Or an exception to the rule of hostile partisanship in D.C.?