This bullshit, Bushist signing statement by Barack Obama is completely wrong and unconstitutional. Here is the Constitution's actual view of the power of the purse:
The Congress shall have Power ...This is not even slightly gray. Congress has the power to specify how its appropriations are used. Otherwise, why bother with budgets - just give the executive all the money.
To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.
Maybe Republicans will now understand why these self-exemptions from lawful acts of Congress are so corrosive of the rule of law. Nah, after keeping silent about Duhbya's similar and much more wide-ranging abuses, they'll just use it for unprincipled political advantage.
The only people in Washington who have consistently objected to this Presidential imperialism are liberals.