From what I see, the Republicans no longer believe in governing a republic, not in the sense that the writers of the Constitution envisioned. The Democrats don't get overwhelming support from people who call themselves Democrats; these people don't show up at elections. You can't have a democracy without the demos (Greek for people).
Maybe we should call them the Gung Ho Corporate Party and the Lukewarm Corporate Party. And maybe we should call the Tea Party the Kool-Aid Party because of the poison they are drinking given to them by the Koch brothers, the American Legislative Exchange Council (ALEC), and other non-elected organizations sponsored by corporate interests.