U.S. President Donald Trump on Monday directed a “pause” on his country’s assistance to Ukraine after a disastrous Oval Office meeting as Trump seeks to pressure Ukrainian President Volodymyr Zelenskyy to engage in peace talks with Russia.

A White House official said Trump is focused on reaching a peace deal to end the more than three-year war sparked by Russia’s all-out invasion of Ukraine, and wants Zelenskyy “committed” to that goal. The official added that the U.S. was “pausing and reviewing” its aid to “ensure that it is contributing to a solution.” The official spoke on the condition of anonymity to discuss the assistance.