Guy Maurice Marie Louise Verhofstadt is a Belgian liberal politician and an advocate of a Federal Europe. He is a former prime minister of Belgium. He has been a member of the European Parliament (MEP) from Belgium since 2009.

The European Federation, also referred to as the United States of Europe (USE), European State, or Federal Europe, is a hypothetical scenario of European integration leading to the formation of a sovereign superstate, organised as a federation of the member countries of the European Union (EU), as contemplated by political scientists, politicians, geographers, historians, futurologists and fiction writers. At present, while the EU is not a federation, various academic observers regard it as having some of the characteristics of a federal system.