The Left's pathological hatred of President Bush distorts its thinking and its behavior. I could give many examples, but here is one. The Left makes it seem as though President Bush's use of signing statements is (1) unprecedented and (2) patently unconstitutional. Neither is the case. Every president, including Bill Clinton, has issued signing statements to the effect that certain provisions of a statute are unconstitutional and, as such, unenforceable. Nor is there anything unconstitutional about this. The Supreme Court is not the sole arbiter of what the Constitution means. Every agent of government takes an oath to uphold the Constitution—as he or she understands it. See here for law professor Walter Dellinger's defense of presidential signing statements. Dellinger may not like the signing statements President Bush issues, but he knows that President Bush has every right to issue them.
Addendum: The American Bar Association, which has condemned President Bush's use of signing statements, claims to be "nonideological." See here. This is risible. "As the economist Joan Robinson once remarked, ideology is like breath: one does not smell one's own." Kenneth Minogue, "Totalitarianism: Have We Seen the Last of It?" The National Interest (fall 1999): 35-44, at 42.