Republicans or Democrats........they are the same.
The chief problem of American political life for a long time has been how to make the two Congressional parties more national and international. The argument 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. The policies that are vital and necessary for America are no longer subjects of significant disagreement, but are disputable only in details of procedure, priority, or method …..Then it should be possible to replace it, every four years if necessary, by the other party, which will be none of these things but WILL STILL PURSUE, with new vigor, approximately the SAME BASIC POLICIES.
source: Tragedy and Hope: A History of the World in Our Time, page 1247, New York: Macmillan, 1966.
