Personal Responsibility

Isn’t “Personal Responsibility” a Republican mantra? So what the hell happened with the false words coming from Bush’s mouth? Did he not speak them? Were they not false? Does it depend on my definition of what “is” is?
Slate’s M. Kinsley punditizes:

Who was the arch-fiend who told a lie in President Bush’s State of the Union speech? No investigation has plumbed such depths of the unknown since O.J. Simpson’s hunt for the real killer of his ex-wife.