...The conflict in Ukraine risks further deterioration of U.S.-Russia relations and greater escalation if Russia expands its presence in Ukraine or into NATO countries. Russia’s actions have raised wider concerns about its intentions elsewhere in Eastern Europe, and a Russian incursion into a NATO country would solicit a response from the United States as a NATO ally. The conflict has heightened tensions in Russia’s relations with both the United States and Europe, complicating the prospects for cooperation elsewhere including on issues of terrorism, arms control, and a political solution in Syria.