BRUSSELS — Ukraine and its backers in Europe insist that the United States and Russia cannot decide on land swaps behind their backs at a summit this week, but the Europeans concede that Moscow is unlikely to give up control of Ukrainian land it holds.

Ahead of the summit in Alaska on Friday, President Trump suggested that a peace deal could include “some swapping of territories,” but the Europeans see no sign that Russia will offer anything to swap. Europeans and Ukrainians so far are not invited to the summit.

European Union foreign ministers are meeting on Monday following talks on Ukraine among U.S. and European security advisers over the weekend. They are concerned that President Vladimir Putin will try to claim a political victory by portraying Ukraine as inflexible.

Concerns ha

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