The eminent men of a party, in an election extending to the whole country, are never its most available candidates.
 John Stuart Mill, Considerations on Representative Government (1861). copy citation

Context

“while the President of the United States, since the last survivor of the founders of the republic disappeared from the scene, is almost always either an obscure man, or one who has gained any reputation he may possess in some other field than politics. And this, as I have before observed, is no accident, but the natural effect of the situation. The eminent men of a party, in an election extending to the whole country, are never its most available candidates. All eminent men have made personal enemies, or, have done something, or at the lowest, professed some opinion obnoxious to some local or other considerable division of the community, and likely to tell with fatal effect upon the number of votes;” source