The House was set to vote this week on a bill modifying the president's health care law. The Republican bill was supported by the leadership, but ran into trouble and was pulled from the floor before the scheduled vote.
It's an example of the kind of obstacles Speaker John Boehner, R-Ohio, faces in getting legislation through the House. In many recent cases, his problem hasn't been the Democrats as much as members of his own party, backed by proudly conservative outside groups.
The opportunistic political sentiment of never letting a crisis go to waste (see: Rahm Emanuel, among others) has been reframed since the Boston bombings by those seizing on the attack as certain evidence of their positions.