Dr. Carroll Quigley, late history professor at Georgetown, Princeton and Harvard Universities, writing of powers behind the US government in his 1966 book "Tragedy and Hope" , stated:  "The chief problem of American political life...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." ( Pg. 1247-1248 )

Qigley certainly knew from the "inside".  Writing in his book about the CFR [Council On Foreign Relations], he stated:    
"There does exist, and has existed for a generation, an international Anglophile network which operates, to some extent, in the way the radical Right believes the Communists act. In fact, this network, which we may identify as the Round Table Groups, has no aversion to cooperating with the Communists, or any other groups, and frequently does so. I know of the operations of this network because I have studied it for twenty years and was permitted to two years, in the early 1960's, to examine its papers and secret records. I have no aversion to it or to most of its aims and have, for much of my life, been close to it and to many of its instruments...I have objected, both in the past and recently, to a few of its policies...but in general my chief difference of opinion is that it wishes to remain unknown, and I believe its role in history is significant enough to be known." (Pg. 950)