The New York Times quoted Vladimir Frolov, a Russian foreign affairs analyst, as saying: "Trump is God's gift that keeps on giving. Trump implements Russia's negative agenda by default, undermining the US-led world order, US alliances, US credibility ... Russia can just relax and watch and root for Trump."
Western unity has never looked more ragged. Putin's competitors, the leaders of Britain, Germany and France, are also struggling. Chancellor Angela Merkel is on a long goodbye from power, due to retire in 2021. French President Emmanuel Macron has been under siege from protesters and anaemic poll ratings. May is trying to ride the chaotic Brexit saga to some conclusion.
In the Middle East, Russia is the key power broker after Putin's intervention turned the tide of the Syrian civil war in Bashar al-Assad's favour. Russia is allied with Syria and Iran and talks to Turkey, Israel, Hamas and Hizbollah.
The Trump Administration's Syria move was a gift for Russia. Defence Secretary Jim Mattis quitting removed an official willing to argue policy with Trump. Russia and its allies have an opening to consolidate control over Syria as the US abandons Kurdish allies and civilians.
Yet there are valid reasons for ending the American footprint in Syria. Why should it drag on endlessly? Troops are in harm's way. It's expensive.
But a swift pullout is rash and risky, leaves a vacuum Isis could grow into like a tumour, endangers lives and could set off another refugee wave.
There's also another conspicuous vacuum: US international leadership is weak and erratic.
Putin and other leaders know it and are taking advantage. The world must look pretty good from Putin's seat in the Kremlin.