Scott Wilson of the Washington Post reports that Vice President Biden arrived in Warsaw:
... Tuesday to reassure a set of allies anxious over Russia’s move into Crimea, a visit he will use to pledge additional security assistance and American help in diversifying Eastern European energy supplies heavily dependent now on Russian natural gas.
This will, one suspects, be a tough sell if, as:
One senior administration official, speaking on condition of anonymity to discuss the vice president’s plans, said his trip is “first and foremost to reassure our allies that we are deeply concerned about Russia’s action in Ukraine and what the deeper implications might be.”
And If Biden will:
… not offer changes to administration plans for a missile defense system in Eastern Europe, which Obama adjusted on taking office at a time he was pursuing a “reset” in Russian relations.
Not so reassuring.