While Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State John Kerry agreed on Saturday that both countries will use their influence on the two sides of the Ukraine conflict to end hostilities, Moscow said it would retaliate against Washington’s most recent sanctions over Ukraine by denying entry to several U.S. citizens.

For months, the United States and the West have been searching for a way to drive a wedge between the Ukrainian separatist rebels and Russia. Even as recently as this week, the main effort has been the use of economic sanctions, which have had little effect. Russia's behavior is vulnerable to pressure, particularly as a result of the tragic downing of Malaysia Airlines Flight 17. The politics of embarrassment, not economic sanctions, are the best avenue to achieve our most important goal in Ukraine, a state free from Russian domination.