To understand why Republicans won't raise the debt limit until after they hold a symbolic vote on a plan to squeeze the government down to a size that would require it to gut popular entitlement programs, it's important to realize it's not just because of the political perks. Powerful conservative interest groups are demanding they vote for it. And at the same time they're warning the GOP against voting for the only viable option currently on the table for avoiding a catastrophic debt default.
"Cut, Cap, and Balance will fix our fiscal mess. The McConnell-Reid plan does not," said Club for Growth President Chris Chocola in a statement accompanying an alert that these votes will be counted on the group's scorecard. "McConnell-Reid simply punts our budget problem further down the road and is everything that's wrong with Washington. Congress has proven that they are unable to balance the budget without reform. Cut, Cap and Balance is the only plan that permanently handcuffs politicians from spending more money than they take in."
If you're a Republican, voting for Plan B means you're that much likelier to face a primary. By holding the test votes on Cut, Cap, and Balance, and the Balanced Budget Amendment, they can at least meet the Club for Growth, and similar groups half way.