"Though that may not be enough to compel Putin to seek peace, it does suggest that the walls are closing in on him."

Swiss President Karin Keller-Sutter flew to Washington on Tuesday to seek talks with the Trump administration over the steep 39% tariff imposed on Switzerland. But Keller-Sutter was only able to meet with Secretary of State Marco Rubio, not with any of the primary tariff negotiators.

Washington and Moscow are aiming to reach a deal to halt the war in Ukraine that would lock in Russia’s occupation of territory seized during its military invasion, according to people familiar with the matter.