In 1942 Nicholas J. Spykman, a Dutch-American geostrategist, argued that a United Europe will be disadvantageous under any circumstances. He preferred a fragmentation of power among states within Europe as more advantageous to American interests.
Therefore, Spykman was opposed strongly to the development of a European Federation, even it to came about peacefully or democratically. Of course, he also opposed to both German and Russian domination of Europe. In his book, "America's strategy in world politics: the United States and the balance of power", which gives us a framework to understand Post Cold War world, he wrote "A Federal Europe would constitute an agglomeration that would completely alter our significance as an
Atlantic power and greatly weaken our position in the Western Hemisphere".
Since 1970s it has been easy to see that the more united Europe become, the greater its tensions with the U.S.. And in the early 1990s America policymakers were so happy so see the fragmentation of both the Soviet empire and the former Yugoslavia. They also agreed with the split of Czechoslovakia, which occurred in 1993.
Nowadays Americans are still fearing a European Super-State with its single foreign policy, as it would be a competitor of the U.S.. In this perspective, the President elected Donald Trump said that Brexit will be a great thing for U.K., and he hopes other E.U. countries will do the same. Although Spykman opposed to the development of a Federation of states within the old continent more than 70 years ago, the U.S. is still trying to fragment Europe.
In the meanwhile, encouraged by the U.S. presidential election and U.K.'s Brexit referendum results, Europe's far right leaders get together in Germany this month. Many of those anti-europeanism leaders face important election in the course of this year.