Officials inside the Biden administration have been contemplating ways Putin could exit his unprovoked war should he choose to do so, as the conflict grinds on and the Russian leader loses his chance for a quick triumph.

US officials still believe Putin is undeterred and wants a tangible victory in Ukraine. But they don’t know what measure could be sufficient for Putin to declare victory, one official told CNN, who said his goals are not readily apparent…

So far, Russia has not taken any known direct action against the United States or NATO in response to ongoing military and intelligence support.

US officials have been left to speculate why Moscow has held back, particularly when it comes to cyberattacks, which the US warned ahead of the war that Russia might use as retribution for US assistance. Russia has also not moved to strike Kyiv during the visits of a host of senior American leaders, from House Speaker Nancy Pelosi to Secretary of State Antony Blinken.