President Obama has more than a few congressional GOPers shaking in their boots with his threat to not pay Social Security checks after August 2 if Republicans don't cave in to his demand that they support tax increases and hiking the national debt limit. It's a variation of the familiar Democratic tactic that has worked so often in the past. But here's how Republicans can snatch the Social Security weapon right out of Obama's hands: Congress has all of the ultimate weapons in any showdown with the president or the federal judiciary, thanks to its status as the First Branch...