Republicans in Congress have been disgusting, but I don't think they'd go so far as to vote to impeach the President.
After watching the antics of Charlie Bass and his gang of Soros-funded "moderates", I'm not so sure of that any more.
Wait until after the '06 election when they are in the minority. If you think they are spineless now, wait until you see how they react to losing power. Most will do whatever the Democrats tell them to do which isn't a whole lot different from now!