President Volodymyr Zelensky of Ukraine said he would meet with President Trump in Washington on Monday. Mr. Trump and President Vladimir V. Putin of Russia held talks in Alaska but announced no agreement on ending the war in Ukraine.

The summit will also give Putin the chance to appeal to Trump’s business interests. Russia’s Finance Minister Anton Siluanov and Kirill Dmitriev, a senior economic negotiator and head of Russia’s sovereign wealth fund, are among those who accompanied Putin to Alaska.