Hey, whether or not you think Clinton is self-respecting (and that is opinion only), he stood up against an incumbent president and won two terms. And he was unknown, as the elder Bush was fond of pointing out.
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mamajuana-- I think you misunderstood me.
I meant to say when there is a Democrat President running for re-election, no one
in his party will run against him. Same with Republicans. You are correct that no Republican will run against Bush. It just isn't done, unless it is almost assured by incredibly low poll numbers that the sitting Pres. cannot win, or is currently mortally wounded by a scandal... but Clinton may have broken that mold. He survived a terrible scandal.
The only time I recall a sitting President being sabotaged by a member of his own party was Kennedy against Carter. It was only done because Carter's Presidency was so bad. I don't know any other time this was done. I wonder if one of our noted historians can shed any light on this phenomena.
Certainly, all Presidents can be challenged by the opposing party.
Just wanted to clarify.