"In negotiations, it’s about who needs a deal the most," says Timothy Ash, an associate fellow at the Chatham House's Russia and Eurasia Program. "I think the leverage is with Trump, not Putin."Trump has leverage in economic, military, and diplomatic terms —  the main question is his willingness to use it.Russia’s economy is showing signs of weakness, making Putin more vulnerable than ever to additional economic pressure like sanctions. Ramped-up support for Ukraine on the battlefield could add to Russia’s mounting losses and further incentivize dealmaking, as would uniting support among allies and squeezing Russia on the diplomatic stage."A long war doesn’t hurt Trump very much. There's no huge cost to the U.S. economy. No U.S. lives are in danger," said Ash, adding that a large portion of U.S.