By a United States of Europe, are you meaning a unification of European countries? That is highly likely, actually. The European Union is a supranational organization and politically binds all its nations. There are elections in the EU, for example, which is a reason why some people consider the EU to be a country already. Every country in Europe (with the exception of Switzerland, but they could likely change their mind) has plans for joining the EU. Once this happens, there's no doubt that the EU will fuse into a single nation. Regardless if every European country joins the European Union or not, it will likely fuse into a single nation someday.
No
The first country formed was the U.S.A. . Europe soon followed, but the US was about 5,000 years prior to Europe's formation
The Soviet Union formed the Warsaw Pact to use the occupied nations of Eastern Europe as a buffer zone against the US and western Europe.
Russia
Although the US has formal trade and mutual defense agreements with several European countries, it was never "a part of" anything in Europe. Before the USA was created, much of the territory along its Atlantic coast was comprised of British colonies. But simultaneously with the formation of the US, those connections were totally, dramatically, and irrevocably severed.
US and Europe
Europe is not located in the US. Europe is a continent located on the opposite side of the Atlantic Ocean from the US.
No,the US is in North America and Europe is a different continent.
Europe is larger than the continental US. Europe - 10,180,000 km2 Continental US - 9,798,364 km2
Europe is its own continent and is not a country. The US is a country in the continent of North America, so Europe is not located in the US.
Schism
Yes, lots of people from Europe go to the US.