Maybe, maybe not. We're currently the Soviet Union in the 1970s. Gerontocratic. Sclerotic. Hyped up on a new mythology. And economically uncompetitive on several levels, with the future (then computers, now elecrification) sweeping past us to our applause.
Unlike the Soviets, however, we can see it happening and debate it. If '26 and '28 change course, the damage will still be done. But the America Empire is still young. And Trump's stupidest policies–the tariffs, fighting the Fed, Greenland and raising a Gestapo–don't have the support of most Americans. That leaves hope for reform through electoral pressure.
It will take work. But it's as incorrect to assume indefinite American hegemony as it is to preëmptively concede the game.