There isn't enough time for what? To cast two impeachment votes? How long did it take for Clinton? And for that matter, what do they care if it runs into '08 campaigning time. They'd love it.
There is a little more to it than just casting impeachment votes. The case has to be presented to Congress (and to the voters) and that takes time.
How long did it take for Clinton?
Better part of a year and a half, start to finish.
And for that matter, what do they care if it runs into '08 campaigning time
You misunderestimate three things. One, the will of the American people for this sort of thing in a time of war. I just don't think the electorate is going to tolerate trumped up charges against Bush and Cheney and this will be even more prevalent if we are hit with another terrorist attack (very likely, IMO). The 'Rats may very well try if they gain control of the House, but I predict a fizzle at best. This is especially true with so many of the Congresscritters voting in favor of the war in Iraq and regime change in Iraq as being the official policy of the United States since 1998.
Two, there simply isn't time for them to impeach a sitting POTUS and Vice POTUS and leave time for campaigning for the '08 election.
And three, you assume that the 'Pubbies will just sit by and allow it to happen. If you've been paying attention the past few years you should have noted how the minority party can delay all things in Congress, even with a very narrow margin of control, i.e. the current Senate. I seriously doubt that the 'Pubbies will just sit by an allow an impeachment to occur.
With all this being said, I still don't believe that the 'Rats will take control of both houses anyway. If they fail to take both houses, the impeachment thingy is dead.