US President Donald Trump’s 50-day pause ahead of possible secondary sanctions on Russia gifts the Kremlin a window to exploit the incremental gains of recent weeks in Ukraine’s east.

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 of...

“Russia is not changing its strategy — and to counter this terror effectively, we need to systematically strengthen our defenses: more air defense systems, more interceptors, and more determination —...

If Trump now permits a substantial amount of U.S. weapons to continue to flow to Ukraine, that would mark an important change. Since Trump took office, many in Ukraine and European capitals have thought that might well be the best-case scenario for Ukraine, given the U.S. president's clear hostility to continuing U.S. donations.

Former Russian President Dmitry Medvedev said on Thursday that the West was practically waging a full-scale war against Russia and that Moscow should respond in full and, if necessary, launch preempti...

The plan, which Trump and NATO Secretary General Mark Rutte hatched in recent days, according to two sources familiar with the discussions, has been received positively by Ukraine and its allies.