A Political Word Puzzle

From The Daily Nexus:

Can you think of two separate words that perfectly divide and encapsulate the beliefs, preferences and characteristics of 300 million different people? No? Well then, how lucky are we that our country’s government has been able to base its entire decision-making process on that very concept. There may have been a time when it really meant something to be a Democrat or Republican (say, when the parties were first founded so that like-minded people could band together in order to give their collective interests a larger voice), but when your group’s membership begins to number in the tens of millions, acting like everyone’s desires are exactly the same becomes something of a charade . . .