US President Joe Biden intends to push for continued support for Ukraine in the final weeks of his presidency, his National Security Advisor Jake Sullivan said on Sunday. Sullivan told US broadcaster CBS that Biden would present this position in Congress and to the incoming administration of the Republican Donald Trump. He reaffirmed that the US government plans to deliver all previously promised aid to Ukraine for fighting the Russian invasion by the transfer of power to Trump on January 20. During his campaign, Trump announced that he would quickly end the war in Ukraine, which has been ongo…