The U.S. has paused intelligence-sharing with Ukraine, CIA Director John Ratcliffe said on Wednesday, piling pressure on Ukrainian President Volodymyr Zelenskiy to cooperate with U.S. President Donald Trump in convening peace talks with Russia.

The suspension, which could cost lives by hurting Ukraine's ability to defend itself against Russian missile strikes, followed a halt this week to U.S. military aid to Kyiv. It underscores Trump's willingness to play hardball with an ally as he pivots to a more conciliatory approach to Moscow from previously strong U.S. support for Ukraine.

The pressure appears to have worked, with Trump on Tuesday saying he received a letter from Zelenskiy in which the Ukrainian leader said he was willing to come to the negotiating table.