This cracking and rotting is originally caused by a series of structural problems that transcend any economic cycle: There are structural problems in the economy as growth slows and the middle class incomes stagnate. There are structural problems in the welfare state as baby boomers spend lavishly on themselves and impose horrendous costs on future generations. There are structural problems in energy markets as the rise of China and chronic instability in the Middle East leads to volatile gas prices. There are structural problems with immigration policy and tax policy and on and on.

As these problems have gone unaddressed, Americans have lost faith in the credibility of their political system, which is the one resource the entire regime is predicated upon. This loss of faith has contributed to a complex but dark national mood. The country is anxious, pessimistic, ashamed, helpless and defensive…

New political forces will emerge from the outside or the inside. A semi-crackpot outsider like Donald Trump could storm the gates and achieve astonishing political stature. Alternatively, insiders like the Simpson-Bowles commission or the Senate’s bipartisan “Gang of Six” could assert authority and recreate a strong centrist political establishment, such as the nation enjoyed in the 1950s.