"Why" they end up on one side or the other is important.
Party-faithful arguments include simple head counting and guilt by association.
I'm sure they'll all give flowery little speeches outlining their reservations, etc, but in the end, I think Miers will pass with virtually unanimous R support.
Now, don't get me wrong, I would've picked someone else. But after watching the MSM attack Bush over Katrina, Iraq, watching the attacks on Delay and Frist, and listening to Chris Matthews and the other froth-at-the-mouth leftists on Plame-gate, I'm feeling a lot more like a team player.
That means I'm not going to help the other side by attacking our own quarterback, whether he throws an interception or not, at least not right now, at this time.
Call me a Bushbot if you want, but I expect almost ALL of the R Senators will make the same political calculation.