This week was pretty bad. But next week will be worse.

There is no "learning curve" for the president. He changes his tune for the same reasons a salesman does: to close the deal.

His administration can't get on the same page about Syria because there is no coherent foreign policy. Anything is possible, and that's horrifying.

The missile attack on Syria shows how the president has caved to the Pentagon—with deadly consequences for U.S. foreign policy.

Institutional safeguards have already checked a dangerous president—but risk eroding the institutions themselves.

America's most unpredictable president has come to power just as the liberal world order is giving way.

The president-elect joins a long minority tradition within the GOP of opposition to European alliances, and it could lead to global conflict.

And it could have disastrous consequences with Russia and China.

Defining Putin as America's main enemy is threat inflation at its worst.

The old Cold War rivals could team up against emerging powers.

His reaction to the truck attack in Berlin, and his disinterest in daily intelligence briefings, show a reckless indifference to Americans' safety.

Donald Trump's nomination of David Friedman as ambassador to Israel may finally clarify the U.S. position on Israel-Palestine.

His lies are a problem, but his belligerence is worse: It could start a war.