I can't believe that even 10% of republicans would vote for kerry- OVER WHAT??
It's far more likely that people think they're being sneaky and manipulative by claiming to be from one party and then endorsing the opposite candidate.
I've been getting emails from some outfit called "Republicans for Change." One was written by Dwight Eisenhower's son John, another by some ex-governor of Minnesota. When I try to write them back to tell them any group urging the election of Hanoi John should be called "Republicans for Treason," the reply bounces.