Though Trump's decision was welcomed by leaders in Kyiv, Ukrainians and their supporters abroad also raised concerns that the 50-day window may offer Russian President Vladimir Putin an opportunity to intensify his long-range strikes against Ukrainian cities and ongoing summer frontline offensive.

President Donald Trump’s ultimatum to Russia to accept a peace deal in Ukraine within 50 days or face bruising sanctions on its energy exports has given the Kremlin extra time to pursue its summer offensive.