There's concern the US President's given Russia too much breathing room in his ultimatum.
Donald Trump says the Kremlin has 50 days to reach a ceasefire deal for Ukraine or they'll introduce secondary tariffs of 100%.
He's also confirmed plans to sell billions of dollars of US weapons to Ukraine, through NATO.
International relations professor Robert Patman told Heather du Plessis-Allan Vladimir Putin will likely use the time to stall.
He says he'll hang in there and hope the Europeans become demoralised and Trump changes his mind again.
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