Republicans and Democrats

In the minds of the ill-informed the political struggle in the United States has always been viewed as a struggle between Republicans and Democrats.
...the idea that the two parties should represent opposed ideals and policies, one, perhaps of the Right and the other of the Left, is a foolish idea acceptable only to doctrinaire and academic thinkers. Instead, the two parties should be almost identical so that the American people can "throw the rascals out" at any election without leading to any profound or extensive shifts in policy.

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Carroll Quigley, Mentor of President William Jefferson Clinton,

in Tragedy and Hope: The History of the World In Our Time.