At least Putin is happy.

First, President Trump blindsided his aides and the rest of the world by deciding to pull the full contingent of some 2,000 American troops out of Syria, helping the Kremlin to confirm Mr. Putin’s gamble that intervening in Syria would revive Russian influence in the Middle East.

Mr. Trump followed that up by declaring that the United States would pull half its forces out of Afghanistan; the combined withdrawals prompted the resignation of Jim Mattis, the respected general who leads the Pentagon.

All that followed Mr. Trump’s already substantial effort to undermine NATO and the European Union by weakening the American commitment to its traditional alliances.

By among other things energetically alienating all their heads of state.