There’s also the giant new doubt about how good a guarantee from Donald Trump really is: the US president’s fixation on “acquiring” Greenland has severely undermined Nato.
He’s also undermined the very principle of protecting a nation’s sovereignty, the whole basis for Western support for Ukraine.
So can Kyiv trust him to come to the rescue in the next crisis? For now, it doesn’t have much choice.
As for trusting Vladimir Putin, no one here is under any illusions that his aims have changed.
“He really doesn’t want it,” is what Zelensky said in Davos about Putin and peace.
The Kremlin has said that if it doesn’t get what it wants at the talking table, it will “achieve its aims on the battlefield” – though it’s failed so far, despite sacrificing huge number of soldiers.
So once again, it’s targeting civilian infrastructure across the country – but in a more deliberate, sustained, and devastating way than ever before.
In the depths of a bitter winter, that’s left people freezing in their homes.
Today, the mayor of Kyiv again called on city residents to leave if they have somewhere to go.
“The enemy will most likely continue to attack the critical infrastructure of the city and the country,” Vitali Klitschko warned.
After repeat attacks, the system is very fragile.
“I address the residents and say honestly: the situation is extremely difficult and this may not be the most difficult moment yet.”