UNSUSTAINABLE: “The problem, obviously, is the debt, not the debt limit. But the public’s focus on the debt ceiling presents both an opportunity and a hazard for Republicans–an opportunity, if they can extract substantial spending cuts and other relief in exchange for what I assume is an inevitable increase in the limit; and a hazard if they can’t, and if voters perceive an extension of the limit as evidence that Republicans aren’t following through on their promises.”