US Democratic Party Slogan

[koster]

The US Democratic Party Slogan aimed at the somewhat untrustworthy figure of Richard Nixon in the 1968 presidential election has since passed into common usage.

What was it?

(from a newspaper quiz)

[Quizmonster]

Would you buy a used car from this man?

[koster]

Thanks.

[Stuart Smale]

Only references to that phrase i can find refer to the 1960 elections, is that defianetly the correct answer?

[Quizmonster]

To be perfectly honest, I did not even check the year involved! I knew the answer I offered earlier applied to him and it certainly fits beautifully with the 'untrustworthy' element of the question. I now wonder whether the '1968' date in the question is just a misprint.
Better check, Koster! My apologies if I got it wrong.

[koster]

Rightly or wrongly, I plumped for "Tricky Dicky".