According to Politico:
Having a national, unifying position ostensibly standing outside the daily muck of politics provides a rallying point for all citizens and a safety valve to redirecting national passions in a non-partisan way.
We have no such safety valve in the United States. Our experiment in self-government has progressed to the point where the differences in our increasingly complex country are now the salient feature of public life…. The result is a country that is becoming shriller, more willing to demonize opponents and less united.
There is, for many Americans, nowhere to turn to find a sense of common meaning.