The conflict in Ukraine’s east could remain unresolved indefinitely unless all sides pursue a different course toward a compromise, says expert Nikolas Gvosdev.

The sentencing of former Ukraine prime minister Yulia Tymoshenko reflects her rivalry with President Viktor Yanukovych and could affect Ukraine’s eurozone bid, says New York Times Moscow bureau chief…

Linton F. Brooks, a member of the CFR Task Force on U.S. nuclear weapons policy, says Iran is "probably the most difficult challenge for the nonproliferation regime" and the United States must priori…

Pavel Felgenhauer, an independent defense analyst in Moscow, is pessimistic about a Russia-U.S. rapprochement in part because of enduring concerns about U.S. missile defense system plans.

Walter Russell Mead, an award-winning historian, discusses the importance of national security credentials and religion in the presidential nominating contests.