US president Donald Trump has declared Russia an 'extraordinary threat' to the US, as Russian despot Vladimir Putin is set to ignore his deadline for ending the invasion of Ukraine.

Trump gave Putin until Friday to agree to a ceasefire with Ukraine, threatening to place enormous tariffs on Russia's main trading partners.

Earlier today, just hours after Trump's top envoy Steve Witkoff met with Putin, the US president signed an executive order that brought India's tariff rate to 50% after it bought Russian oil.

Trump wrote in the executive order following Witkoff's meeting with Putin: 'I have received additional information from various senior officials on, among other things, the actions of the government of the Russian Federation with respect to the situation in Ukraine.'

The Republican president said the new information showed Moscow presented 'an unusual and extraordinary threat to the national security and foreign policy of the United States.'