Bush impedes congressional investigation

Someone please remind me again, why is impeachment off the table?

President Bush derailed a bill by the US Congress aimed at ending the Administration's illegal wiretapping by not providing documents related to the President’s warrantless wiretapping program to the Senate Intelligence Committee that is currently reviewing the proposed legislation.

The evidence that George Bush and Dick Cheney have committed high crimes and misdemeanors is overwhelming. Now they're refusing to cooperate with Congress thereby preventing them from performing their constitutionally mandated oversight duties. Listening to Bush lecture leaders of other countries for their lack of transparency when he is doing his best to turn the United States into the new Soviet Union is the height of hypocrisy. He is going to continue to flip the bird to Congress and the American public until he is dragged kicking and screaming from office. What will it take to get impeachment on the table? What will it take for them to do their duty to protect the constitution? If they don't, it will be hard to prevent the next president from doing more of the same. If not now, then when?