Undecided Voters for McCain

Thought after listening to an NPR story this morning about undecided voters (barely snuck in between their pledge drive begging - how annoying): Most undecideds are probably Republicans/evangelicals/Bushies.  What they haven't decided is whether they're going to break with their roots and vote for Obama.  Normally they'd vote conservative, but they are so dismayed at what the Bush White House has done that they can't decide whether or not they can bring themselves to vote for McCain.  I'd guess most of them won't, if they're still undecided.  So then we should consider most or all of the undecided voters (8 points, right?) going to McCain.