Russia launched four missiles and 136 drones into Ukraine overnight into Monday morning, according to Ukraine's air force, after President Donald Trump said the U.S. would provide Kyiv with more Patriot surface-to-air systems to help defend against Russia's nightly bombardments.

Trump said the United States would put 100% secondary tariffs on countries that do business with Russia if a deal if a peace deal is not reached in 50 days.

President Trump has long boasted of his friendly relationship with Putin, and after taking office in January repeatedly said that Russia was more willing than Ukraine to reach a peace deal.