In this photo provided by Ukraine's 24th Mechanized Brigade press service, servicemen of the 24th Mechanised Brigade fire a 120mm mortar towards Russian positions near Chasiv Yar in Donetsk region, Ukraine on Tuesday, Nov. 19, 2024.

While the incoming Trump administration appears determined to end U.S. support for Ukraine, other western allies — including Canada — say they're not ready to give in. But can they fill the vacuum if America decides to cut and run?