New sanctions and weapons will not stop Russia. It’s time for Ukraine’s allies to change their flawed strategy | Christopher S Chivvis

A negotiated settlement would be unfair and frustrating. But after nearly four years of fighting, it may be the best option

On Wednesday, President Trump imposed substantial new sanctions on Russia's giant oil and gas companies, and lifted restrictions on the use of certain long-range missiles by Ukraine, which will now be able to strike more freely into Russia itself. These moves come on the heels of Trump's conversations last week with Vladimir Putin and Volodymyr Zelenskyy, after which the US president expressed his frustration at both side's intransigence. Trump had hoped to end this war long ago. Will this be enough?

When Russia launched its full-scale invasion of Ukraine in February 2022, the US and its allies chose a strategy that aimed to use Washington's awesome political, economic and military power to impose such high costs on Russia that the Kremlin would sue for peace on Ukraine's terms. This cost-imposition" strategy makes sense in theory. The problem is that, in practice, it has slowed Russia's progress but not persuaded Putin to end his aggression.

Christopher S Chivvis is a senior fellow and director of the American statecraft program at the Carnegie Endowment for International Peace