Russia's Defense Ministry, meanwhile, said its forces downed at least 66 Ukrainian drones overnight into Tuesday morning. Among the areas targeted was the southwestern Voronezh region which borders northeastern Ukraine. At least 16 people were injured there, Gov. Aleksandr Gusev said on Telegram.

Trump’s threats of secondary tariffs are “never going to go anywhere” as long as he is unwilling to impose costs on Moscow directly, Keir Giles, a senior fellow at the London-based Chatham House think tank, told NBC News Monday.

President Trump has effectively handed Vladimir Putin an extraordinary green light: 50 days to finish off his brutal summer offensive in Ukraine before facing any consequences.