U.S. Vice President Joe Biden spoke with Ukrainian President Petro Poroshenko by telephone Thursday to discuss the latest in eastern Ukraine and diplomatic efforts to pursue a ceasefire, the White House said. "The Vice President underscored that the United States remained focused on Russia's actions, not its words," the White House said in a statement. "The Vice President noted the United States is prepared to impose further costs on Russia if it fails to withdraw its ongoing support for the separatists, including the provision of heavy weapons and materiel across the border," the White House said.
