I've been waiting to post on this because I wanted to make sure this was real but it seems to be true.
A full 15 percent of mississippi voters who voted for clinton would be dissatisfied if she were to become president. 4% for obama. The writeup on KOS is pretty good, if you want to delve deeper.
http://www.dailykos.com/storyonly/2008/3/12/02257/1544
By Rush Limbaugh's own admission, he's been actively persuading people to vote for Hillary, although in his case its more about prolonging the internal fighting to soften up the democrats, whoever wins, than it is about facing hillary over obama.