I believe it was Mencken who said something to the effect that ‘no one ever lost money or political office by underestimating the taste of the American people.’ (Loose paraphrase)
“No one in this world, so far as I know—and I have searched the record for years, and employed agents to help me—has ever lost money by underestimating the intelligence of the great masses of the plain people.”
How about this one ...
“The bitter, of course, goes with the sweet. To be an American is, unquestionably, to be the noblest, grandest, the proudest mammal that ever hoofed the verdure of God’s green footstool. Often, in the black abysm of the night, the thought that I am one awakens me with a blast of trumpets, and I am thrown into a cold sweat by contemplation of the fact. I shall cherish it on the scaffold; it will console me in Hell. But there is no perfection under Heaven, so even an American has his small blemishes, his scarcely discernible weaknesses, his minute traces of vice and depravity.”