"The referendum in Crimea was a clear violation of Ukrainian Constitutions and international law, and it will not be recognized by the international community," Mr. Obama warned.
The president has slapped sanctions on eleven people said to have helped Putin grab Crimea,
including ousted Ukrainian President Yanukovich.
Bank accounts of several Putin friends have been frozen and their visas denied, but no sanctions have been placed on the Russian president himself.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.