In the span of this campaign, proof that his judgment is superior to that of [his opponent] has been provided by their respective choices for Vice President… In the brief period since nomination, [opponent’s vice presidential candidate] has already proved from his injudicious, intemperate remarks that he is utterly inadequate.
--The New York Times, October 1968, endorsing Humphrey over Nixon
While we're on the topic here's some damning praise of the GOP vice presidential nominee from California's top Republican:
Brown: Do you think she is she qualified to be president?
Schwarzenegger: I think that she will get to be qualified.
Brown: She will get there? What do you mean? She's not ready yet?
Schwarzenegger: By the time she is sworn in, I think she will be ready. You get to get up to speed. I know, when I became governor, there were a lot of things I did not know. The answer is: Do you have the will? Do you have the will to educate yourself? Do you have the will to get up to speed? Do you have the will? Are you a sponge that absorbs information very quickly? And that's the kind of person that she is. And, I think that is exactly what she would do, also, if she becomes vice president.