United States of Europe
The United States of Europe ( USE ) , the European State , the European Superstate , the European Federation and Federal Europe are similar hypothetical scenarios of a single sovereign state in Europe ( hence superstate ) , organised as a federation similar to the United States of America , as contemplated by political scientists , politicians , geographers , historians , futurologists , and fiction writers . 
<triplet> United States of America <subj> sovereign state <obj> instance of <subj> federation <obj> instance of