Some believe otherwise:
"The United States is a declining hegemon, with a crumbling infrastructure, a failing educational system, a shrinking slice of the global economy, and a deeply polarized, divided citizenry."
https://www.truthdig.com/articles/will-china-be-the-next-global-hegemon/
In addition a woefully ill prepared military machine, unable to be used except in global nuclear holocaust, ill prepared political appointees, nearly 75% of the worlds counties and 80% of it's citizens ignoring ameristani diktat.