The system has evolved to protect parties from people like Donald Trump. It really is true that people without well-established public records, without proven capability in public service, without tested beliefs and at least apparently under the influence of a foreign power, such people are screened out by major parties.

Americans are about to discover that their system is more vulnerable than they thought. There's a lot of complacency in American politics, there's a lot of complacency in advanced democracies generally.

Donald Trump is behaving in an extremely provocative way toward China, having first cancelled the TPP and alienated America's friends in the region. Same thing that he's authorizing much riskier gambits against ISIS, having alienated many of America's allies and friends in the region.

Reagan survived the Iran-Contra scandal because the elements of it that were illegal (aiding anti-communist Nicaraguans) were popular and the things that were unpopular (arming the Iranians) were quite legal.

So little of what makes a democracy work is written down. So much of it is just the things you don't do. There are a lot of things that a prime minister or a president can do and they don't do them because it never occurs to them to do them.

I don't think that disasters have to be spectacular. They can be a slow corrosion.

The system has evolved to protect parties from people like Donald Trump. It really is true that people without well-established public records, without proven capability in public service, without tested beliefs and at least apparently under the influence of a foreign power, such people are screened out by major parties.