Parting shot

Outgoing national security adviser H.R. McMaster became the latest senior Trump administration official to publicly warn that Western governments, including his own, are not doing enough to deter Russian aggression. “Some nations have looked the other way in the face of these threats,” McMaster said in a speech to the Atlantic Council. “Russia brazenly and implausibly denies its actions, and we have failed to impose sufficient costs.” Though Mr. McMaster did not say so explicitly, the critique easily fits President Donald Trump.

McMaster described a determined adversary that cannily exploits both traditional and nontraditional methods of disruption, from dangerous intercepts of NATO aircraft to the sowing of internal U.S. political divisions via Russian-backed social media accounts. All of it is designed to create trouble without eliciting a punishing response—and so far, the strategy has worked.

Congress made a down payment on a more effective response in the omnibus funding bill it passed last month, setting aside money for hardening election infrastructure against Russian intrusion, upgrading voting machines and investing in the FBI’s mission to counter Kremlin plots. But while these sorts of defensive measures might foil some interference operations, they do little to arrest the source of the meddling.

The Treasury Department last month announced sanctions against a handful of Russian hackers and organizations. Yet this move mostly targeted entities that were already facing indictment or other penalties. Treasury Secretary Steven Mnuchin has vowed further sanctions, and we hope they are indeed coming.

The Trump administration should strike at the foundations of Vladimir Putin’s regime—imposing asset freezes and visa bans on the network of oligarchs and officials who execute Russia’s aggressive campaigns against the West. U.S. allies, such as Britain, where wealthy Russians have an appetite for expensive real estate, must be enlisted to cooperate. The alternative is further emboldening a foreign power that has made clear its aim of undermining the foundations of the West.