Some argue that the USA peaked in the 1990s.
Under Trump it certainly seems that the States now have far less world authority and moral influence. Americans consider their politicians corrupt and ineffective.
The Republican / Democrat split solidified by gerrymandering would seem to make gridlock inevitable.
But having toured Washington DC the past 3 days, I’m not so sure the USA is on permanent decline.
My favourite attraction on the mall was the Washington Monument.

Very inspiring.
It’s the world’s tallest stone structure and the world’s tallest obelisk.

George Washington is inspiring too:
If the freedom of speech is taken away then dumb and silent we may be led, like sheep to the slaughter.

My first wish is to see this plague of mankind, war, banished from the earth.
Like the USA, the Washington Monument has problems. $2-3 million is needed to modernize the elevator.

Has the USA peaked? For some reason I think the best is yet to come.

The nation will have to rally around one leader and Party. A fiscally conservative Democrat. Or moderate Republican.
Dinosaurs like Jeff Sessions will need to go extinct for the nation to move forward. Trump is the worst American leader of all time. By far. The sooner his regime ends, the better.