U.S. Senate passes resolution condemning Russia , urging sanctions . OSCE chief says Crimea referendum would make it worse . Pro - Russian billboards show Putin under the swastika . Ruslan Dudkin , a volunteer at a militia camp in Simferopol , compared the protesters who rallied in Kiev 's Maidan Square to topple Yanukovych to `` cockroaches . '' President calls Crimea referendum ` ` absolutely legitimate , '' cites UN precedent .
U.S. Senate passes resolution condemning Russia , urging sanctions . OSCE chief says Crimea referendum would make it worse . Pro - Russian billboards show Putin under the swastika . President calls Crimea referendum ` ` absolutely legitimate , '' cites UN precedent .