The obvious reason Kerry did not sue--he would've lost.
A suit would've established the truth of the Swift Boat evidence. By ignoring it, Kerry hoped his MSM pals would convince voters it was false. He had a better chance trying to brazen it out.
If Kerry thought he could win in court he certainlt could've sued after the election.
I forget who said it but apt, "Fascism always appears a threat in the US, but always lands elsewhere."
The danger of fascism comes from the politically correct leftist socialist agenda of the Democratic Party.
Dean knows no conservative or libertarian would pick up his book, so his only hope is to say something outrageous to attract the left-leaning reading public (about six of them).
Nixon's biggest mistake was in allowing this guy anywhere near his administration.
Kool Aid drinker or liar.
The Swifties were chomping at the bit for such a lawsuit.
Kerry didn't sue the Swiftvets for defamation for one reason--truth is an absolute defense. Dean, a disbarred lawyer, is so dumb he can't even understand that little point.