Across eastern Ukraine, Russia’s tiny gains are adding up. It is capitalizing on a series of small advances and throwing significant resources into an emerging summer offensive, one that risks reshaping control over the front lines.

President Trump said he had decided to shorten a 50-day deadline he had given Russia to end the conflict or face punishing new sanctions.

After President Trump dramatically shortened his Ukraine ceasefire ultimatum for Russia from 50 days to just 10, a top Russian official has responded with a chilling threat. -Dmitry Medvedev, a former Russian president,