WASHINGTON (AP) — Republican Sen. Lindsey Graham said Tuesday that he believes President Donald Trump is prepared to “crush” Russia’s economy with a new wave of sanctions if Russian President Vladimir Putin refuses to meet with Ukrainian President Volodymyr Zelenskyy in the coming weeks.

European leaders joined Ukrainian President Volodymyr Zelenskyy in Washington on Monday in a rare display of unity to end the war with Russia.

A hot mic caught Trump suggesting under his breath that Putin was willing to negotiate after the two leaders met in Alaska for a summit. “I think he wants to make a deal for me. Do you understand?” he said before his press conference with Zelenskiy.

U.S. President Donald Trump and Ukrainian President Volodymyr Zelenskyy’s meeting in the Oval Office was notably different from their last encounter in February