My how times have changed, when to "make love to someone" meant to flirt and the Republicans were the progressives despised by wealthy southern slave holders. I don't know, but for the sake of clarity, I'd argue Twain wasn't referring to the "republican" party (small 'r' if your copying is correct) but rather anyone whose patriotism is devoted to the republic defined as "a political system in which the supreme power lies in a body of citizens who can elect people to represent them..." So, in this instance, given the change in meaning between republican then and Republican now, "democratic" (small 'd') might be more accurate (though I'm not defending the misquote).