The US has been through periods like (and much worse) in the last 60 years:
- 60's race riots across most major cities that resulted in the deaths of hundreds & Vietnam War where every opinion article lamented about "America's global leadership is over"
- Watergate where a sitting president was forced from office due to truly breathtaking corruption and law breaking
- The 80's when Japan was on the rise and people talked about the US falling behind and no longer being a major economic player (I remember people smashing Japan electronics on the Whitehouse lawn)
- Gulf War, LA Riots, Clinton scandals, pre-9/11 terror attacks in the 90's
- In the 2000's, 9/11, the financial crisis (aka "The End of Capitalism")
It's always been like this.