In response to the escalating threat, President Trump confirmed Monday that the U.S. will send additional Patriot air defense missiles to Ukraine. He noted that the European Union would finance the purchase of what he described as "various pieces of very sophisticated" U.S. weaponry.

Major stock markets on Monday largely shrugged off US President Donald Trump’s latest tariffs threat to hit the EU and Mexico with 30 percent levies. Analysts said investors viewed the warning as yet another negotiating ploy against America’s trading partners rather than a genuine move — although lingering uncertainty weighed on oil prices.

President Trump opened his remarks alongside NATO Secretary-General Mark Rutte in the Oval Office on Monday by threatening "severe tariffs" against Russia.