After years pressing to end U.S. aid to Ukraine, many Republicans have abandoned that position now that President Trump is supporting the country against Russian aggression.

President Trump’s sudden decision to send billions in new weapons to Ukraine is not about ensuring a Ukrainian victory, but a high-stakes leverage play designed to force Russia to the negotiating table.

First Lady Melania Trump is making headlines for her unexpected influence on US foreign policy. During a meeting with NATO Secretary General Mark Rutte, President Donald Trump revealed that Melania played a key role in changing his stance on Vladimir Putin.

Ukraine war this week, announcing a deal to send weapons to Ukraine via NATO and giving Vladimir Putin an ultimatum to make peace. Charles Kupchan, senior fellow at the Council on Foreign Relations, speaks with John Dickerson about the president's new stance.

Drones that kill other drones. These machines swarm the skies in vast numbers. They're cheap, they're deadly and they're among the main reasons Ukraine believes it can hold out against advancing Russian forces this year and even beyond,