Russian President Vladimir Putin is unlikely to bow to a sanctions ultimatum expiring this Friday from U.S. President Donald Trump, and retains the goal of capturing four regions of Ukraine in their entirety,

The Russian president says Moscow's initial tough demands must be met, despite a looming US sanctions deadline.

Putin's goal is to fully capture the Ukrainian regions of Donetsk, Luhansk, Zaporizhzhia, and Kherson, which Russia has claimed as its own.