Russian President Vladimir Putin says he hopes to meet U.S. President Donald Trump as the White House seeks to broker an end to the war in Ukraine.

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.

The threat of more U.S. sanctions jump-started stalled peace talks but might not produce a deal to halt the fighting.