Russia poses a threat to Ukraine, again. But what about Russian President Putin’s threat to the unity of Europe, and what do recent developments tell us about global perceptions of America's geopolitical strength? Is Russia a declining power or is Russia on the march? Could it be both?

Our guest, Richard Fontaine, is CEO of the Center for American Security. He was formerly the top foreign policy advisor to Senator John McCain, deputy staff director on the Senate Armed Services Committee, and an official of the US State Department and National Security Council.