Putin to Obama : Russia `` can not ignore the calls for help '' from the US and its allies. Ukraine 's interim prime minister , U.S. President Obama call such a vote unlawful . It was a sentiment echoed by several world leaders , who called the scheduled vote and possible pullout violations of Ukrainian and international law . West threatens Russia with punitive actions over Ukraine .
Putin to Obama : Russia `` can not ignore the calls for help '' from the US and its allies. Ukraine 's interim prime minister , U.S. President Obama call such a vote unlawful . West threatens Russia with punitive actions over Ukraine .