Though I am a W supporter, I would rather see him impeached than see this scenario acted out. I wouldn't follow any president in the process of turning the US into a third-world hellhole. Generations of us have sweated and bled far to much for our Constitution to trash it now.
If you live to see GWB impeached, you won't have to worry about the Constitution because the 'Rats will have nullified everything within it.
I understand that it isn't easy to wrap your mind around the idea that the Democratic Party is no longer a political party, but in fact is a subversive organization no different than the CPUSA, indeed - the policies of the 'Rats are in many ways indistinguishable from those of the Communists.
The Party of FDR, Truman, JFK, Scoop Jackson and Humphrey has been subverted, hijacked and transformed into the Party of Lenin and Stalin. And that is not hyperbole.