Nobody votes against somebody they were planning to vote for because somebody they don't like suddenly endorses them.
Imagin if some GOP SuperPC made this ad and spent a million to air it nonstop in ATL:
Hi, I'm David Duke, former Grand Wizard of the KKK. In this election I support Michelle Nunn, because I personally believe she has the guts to resegregate out schools and remove the Jewish influence from our banks. Vote Michelle Nunn - for a racially pure Georgia!
That's a pretty extreme example and probably out of the bounds of what Griff was talking about.
