Donald Trump is much more suspicious of international institutions; much more skeptical of the contributions that America's traditional allies have made; more willing, in some cases, to entertain the possibility of getting along with countries who some would call an adversary, such as Mr. Putin's Russia.

States would be wise to weaken sovereignty in order to protect themselves.

Shockingly enough, what people say during campaigns is meant to increase the odds they get elected.

We ought to be doing much more in North America. We are on the cusp of an energy revolution. And we do need to be doing more at home. The biggest national security threats facing the United States right now are not in the Middle East. They are domestic.

Donald Trump is much more suspicious of international institutions; much more skeptical of the contributions that America's traditional allies have made; more willing, in some cases, to entertain the possibility of getting along with countries who some would call an adversary, such as Mr. Putin's Russia.

Sovereignty must be redefined if states are to cope with globalisation.

I've worked for four presidents, and I've concluded that almost nothing is inevitable. History is to a significant extent the result of the interaction of personalities and ideas. And so I don't believe war between the U.S. and China is in any way inevitable, and it's well within the province of diplomacy and statecraft to avoid it.