I can't see how you can make ten syllables out of it.
8 possibly, if you put 'ian' together.
Well, I already sent off my entry - but I think I got the Nixon one wrong. I put "Tricky Dicky", but maybe it should have been "Would you buy a used car from this man?".
Found a better syllable counter at wordscount.info - so I reckon #4 is latitudinarianism. I'm stuck with the anti Tricky Dicky slogan (unless it's Tricky Dicky!).