US politics are in turmoil so why is the country booming?

News Snapshot:

In Europe, the three signs of spring have arrived: the bright flora, the endless days and the ambient sound of American voices. All are welcome. But the last is also an annual reminder of the spending power of US tourists. That their economy has outperformed the continent’s this past decade or two can be felt, not just measured. The material success of the US is discussed in all quarters. What isn’t said enough is that it has happened amid political bedlam. The US has roared ahead in the era of the Tea Party, Donald Trump, “forever wars” abroad and culture...