Daniel Senor and Christian Whiton argue that the 2004 Orange Revolution in Ukraine can serve as a model for democratic reform in Iran.

The recent deterioration in relations between Russia and Ukraine should be of great concern to the West.

Listen to Steven Pifer, former U.S. ambassador to Ukraine, discuss Ukrainian-Russian relations with students as part of CFR's Academic Conference Call series.

Jeffrey Mankoff, an expert on Russia, says the dispute that led Russia to cut off natural gas to Ukraine has its origins in differences over pricing as well as Ukraine's interest in closer ties with the West.

This report comprehensively analyzes Ukraine's difficulties, related to both domestic conditions and foreign policy, and recommends ways for the United States to encourage Ukraine on a path of stability and integration with the West.

Robert E. Hunter, who was U.S. ambassador to NATO during the Clinton administration, says he does not expect NATO foreign ministers to enlarge the alliance to include Georgia or Ukraine at the next meeting in December.

Steven Pifer, an expert on Russian affairs and former U.S. ambassador to Ukraine, says U.S.-Russia relations have "deteriorated significantly" since their high point just after 9/11. The next U.S. administration should return to negotiations on limiting strategic arms and other areas of mutual interest, he says.

Listen to Ukrainian President Viktor Yushchenko discuss Kiev's relations with Russia, Europe, and the United States at a CFR meeting.

Watch Ukrainian President Viktor Yushchenko discuss Kiev's relations with Russia, Europe, and the United States at a CFR meeting.

A Council on Foreign Relations Meeting with President Viktor Yushchenko of Ukraine.

Charles A. Kupchan, professor of international affairs at Georgetown University, says the just-concluded NATO summit illustrates the changes taking place in the alliance, where it will become increasingly difficult to reach agreements on issues.

Steven Pifer, former U.S. ambassador to Ukraine, sees little chance a constitutional court will resolve Ukraine’s political crisis, and points to missteps by the Ukrainian president.

This paper from the German Marshall Fund of the United States notes Georgia's better performance compared to Ukraine in two key areas of reform: improving the rule of law and battling corruption. The paper says that Ukraine’s failure to capitalize on the hopes raised by the ‘Orange Revolution’ has been highlighted by the recent Nato summit in Riga, where it became plain that plans to fast track Ukraine’s NATO membership application have been shelved indefinitely.

Ukraine's Orange Revolution is effectively over, with a pro-Russia prime minister back in power. Yet it is far from clear whether the revolution's undoing will erode pro-democracy gains elsewhere in the post-Soviet space.

Taras Kuzio discusses the current political crisis in Ukraine and what it means for the country's relations with the United States, the European Union, and Russia.

Taras Kuzio discusses the current political crisis in Ukraine and what it means for the country's relations with the United States, the European Union, NATO, and Russia.

Twenty years ago, an explosion at the Chernobyl nuclear plant, which spread radioactivity over Europe, seemed to be the death knell of the industry. But a renaissance of interest in nuclear power is underway, driven by higher energy prices, global warming, new technologies, and, some argue, short memories.

Ukrainians go to the polls to show whether they endorse the pace of reforms since the 2004 Orange Revolution or seek to return to warmer ties with Russia. The party of former presidential candidate Viktor Yanukovich goes into the vote with the highest approval ratings of any political bloc.