Shiroki to Baltics : Russia `` can not ignore the calls for help '' Russian lawmakers set a date for a referendum on staying in Ukraine or joining . Russia 's interim prime minister , Obama President Obama call such a vote unlawful . West threatens Russia with punitive actions over Ukraine .
Putin to Obama : Russia `` can not ignore the calls for help '' Crimean lawmakers set a date for a referendum on staying in Ukraine or joining . Ukraine 's interim prime minister , U.S. President Obama call such a vote unlawful . West threatens Russia with punitive actions over Ukraine .