Would it be possible to impeach the president and the vice president at the same time?

This question comes from a European-born friend who is mostly resident in the States, and keeps a jaundiced eye on U.S. politics.

I suspect that a lot of us over on this side of the political spectrum go back and forth these days between the unshakable pessimism that's been ground into us these last five or six years and a giddy, almost manic euphoria at the possibilities that are opening up for the 2006 elections. There is at least the chance that, on the strength of the "performance" of the Republicans in their demonstration of one-party government, hardly any of their number will be able to get elected dog-catcher next year.

I bring this up because DWT, in his effervescing-about-2006 moments, fantasizes about a real, live impeachment if the Democrats retake the House of Representatives. Not impeachment-and-conviction, mind you. Even if the Democrats should recapture the Senate, he doesn't have much faith in nominal Democrats like the Nelsons. But impeachment nonetheless.

Of course our Chimpy has the best impeachment insurance money can buy--and Dick Cheney, our one and only veep, doesn't come cheap. Which brings us back to my friend's question. I'm sure there are technical problems with simultaneous management of two proceedings that are in most respects independent. But a lot of the evidence would surely apply to both malefactors, and if you can have joint trials in ordinary criminal matters, why not in this?

Does anybody know whether this is possible?

It's something to think about, anyway.