French President Emmanuel Macron has warned that the global credibility of the United States and its NATO allies is on the line in Ukraine, as U.S. President Donald Trump attempts to end the Russian invasion once and for all.

U.S. and European military planners have begun exploring post-conflict security guarantees for Ukraine, U.S. officials and sources told Reuters on Tuesday, following President Donald Trump's pledge to help protect the country under any deal to end Russia's war.

Rather than exploiting Russia’s weaknesses, a drone-centric NATO could be playing to Russia’s strengths, some experts warn.

ABC News’ Stephanie Ramos is joined by the former U.S. ambassador to Ukraine, William Taylor, to weigh in on the aftermath of Trump’s meeting with Ukraine and European leaders.

NATO Secretary-General Mark Rutte praised President Trump during a White House meeting on Monday for "breaking the deadlock" of the Ukraine War by starting a dialogue with Russia. "I really want to thank you,

"This latest strike against our energy security is outrageous and unacceptable!" Hungarian Foreign Minister Péter Szijjártó posted to X on Monday morning.

Special U.S. envoy Steve Witkoff says Russian leader Vladimir Putin agreed to allow the U.S. and Europe to offer Ukraine a security guarantee resembling NATO's collective defense mandate.