Douglas

“Yes,” I said, “that is what I mean to say. I am not going to vote for him.” The others began to find their voices. They sang the same note. They said that when a party’s representatives choose a man, that ends it. If they choose unwisely it is a misfortune, but no loyal member of the party has any right to withhold his vote. He has a plain duty before him and he can’t shirk it. He must vote for that nominee. I said that no party held the privilege of dictating to me how I should vote. That if party loyalty was a form of patriotism, I was no patriot, and that I didn’t think I was much of a patriot anyway, for oftener than otherwise what the general body of Americans regarded as the patriotic course was not in accordance with my views; that if there was any valuable difference between being an American and a monarchist it lay in the theory that the American could decide for himself what is patriotic and what isn’t; whereas”
― Mark Twain, Autobiography of Mark Twain: The Complete and Authoritative Edition, Volume 1