Ukraine’s Zelensky talked to Trump 24 hours later and hoped the United States will monitor any ceasefire as Kyiv and Moscow traded salvos overnight.

But his Tuesday phone call with Russian President Vladimir Putin only underscored that the Kremlin is so far the bigger obstacle.The question now facing Trump is whether to apply real pressure on Putin to make concessions or try to wring more compromises out of Kyiv than he already has.

Ukraine and Russia exchanged aerial attacks overnight, just hours after the Kremlin agreed to temporarily halt attacks on energy infrastructure targets, but stopped short of signing off on a broader ceasefire.