Not for the first time, European capitals are gripped with apprehension that Russian President Vladimir Putin will surgically divide the transatlantic alliance as well as get everything he wants in Ukraine.

Ukrainian President Volodymyr Zelenskiy won diplomatic backing from Europe and the NATO alliance on Sunday ahead of a Russia-U.S. summit this week where Kyiv fears President Vladimir Putin and President Donald Trump may try to dictate terms for ending the 3-1/2-year war.

NATO Secretary General Mark Rutte said this week’s US-Russian summit may open the door to negotiations about Ukrainian territory, even as President Volodymyr Zelenskiy has continued to reject ceding land occupied by Russia.