We select a candidate for any office we are not selecting a leader—in fact we are not looking at character traits at all—we are merely selecting a mirror, and the man who can best function in that reflective capacity is the victor.
“Politics, under a democracy, reduces itself to a mere struggle for office by flatterers of the proletariat; even when a superior man prevails at that disgusting game he must prevail at the cost of his self-respect. Not many superior men make the attempt. The average great captain of the rabble, when he is not simply a weeper over irremediable wrongs, is a hypocrite so far gone that he is unconscious of his own hypocrisy—a slimy fellow, offensive to the nose.” 
Since democracy requires the politician not only to try to ‘mirror’ my desires, but also a thousand others, the one who wins is not simply a mirror, but a complex prism of sorts, attempting to ‘represent’ a thousand wills at once. The last person he is actually allowed to be is himself. Needless to say, no authentic man—much less a great leader—would subject himself to such degradation. And yet we demand it of all politicians.
 H.L. Mencken, Introduction to Nietzsche’s The Antichrist.