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The most likely scenario as I see it today — the one that's taking shape... President Trump, I think, by May or June at the latest, will realize that Putin is not capable of making agreements, and he'll start stepping away from the issue. Ukraine will no longer interest him. He’ll blame everything on the Europeans: “These are your problems — deal with them yourselves.”

One and a half to two years (Answer to the question: 'How many years do you give this regime?' (Putin's regime))

Probably, there will be a complete end in the spring-summer (The end of the war)

I don't think this will significantly affect his image (The withdrawal of Russian troops from Kherson will not greatly impact Putin's image)