The fact of the matter is that this is a despicable act for any President of these United States, regardless of party. The Bush Administration wants the courts to enforce his interpretation of the law, and for Congress to pass the laws they suggest. They have a complete disregard for the Constitution, but for the facade of working under it they are working to completely undermine it legally - such as with the signing statements. Blatantly blocking an investigation into the constitutionality/legality of the NSA surveillance program reeks of fascism. I don't think that the surveillance program is legal even under FISA, but at least it made it technically legal - Bush has even skipped this pesky check and balance.
It's a slippery slope, and we're falling fast.
"We are materialists and atheists, and we glory in the fact." - Mikhail Bakunin