As democracy is perfected, the office [of the President] represents, more and more closely, the inner soul of the people. We move toward a lofty ideal. On some great and glorious day the plain folks of the land will reach their heart’s desire at last, and the White House will be adorned by a downright moron.

H. L. Mencken (1880-1956) American writer and journalist [Henry Lewis Mencken]

“Bayard vs. Lionheart,” The Baltimore Evening Sun (26 Jul 1920)

Variant: "As democracy is perfected, the office of the President represents, more and more closely, the inner soul of the people. On some great and glorious day, the plain folks of the land will reach their heart's desire at last, and the White House will be occupied by a downright fool and a complete narcissistic moron."

Verification and discussion of this quotation here, here, and here.