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The EU will "have to stick to its guns" regarding Russian sanctions following the "illegal" referendum in Crimea, says Radek Sikorski, Polish foreign minister.
CNBC's Michelle Caruso-Cabrera provides insight into the Crimeans' referendum vote to leave Ukraine and join Russia, and the current condition of the Russian market.
Dr. Leon Aron, American Enterprise Institute director of Russian studies, thinks the United States will impose sanctions on Russia in conjunction with the European Union as early as Monday morning.
The EU is to discuss possible sanctions against Russian officials, who are behind the country's "illegal" decisions and actions in Ukraine says Linas Linkevicius, Lithuanian foreign minister.
Lilit Gevorgyan, CIS analyst at IHS Global Insight, discusses Russia following the Crimean referendum to join the country and how increased tensions between Russia and the West could impact investments.
Tina Fordham, senior global political analyst at Citi, highlights Russia currently has "no legal mechanism" in place to absorb Crimea and that the status the region would have remains undetermined.
Illinois senator Dick Durbin says Russian president Vladimir Putin uses natural gas as a bargaining tool in political affairs.
Ukrainian foreign minister Andrii Deshchytsa, says Ukraine and its allies can convince Russia to stop short of military conflict.
U.S. senator John McCain dubs the Crimea referendum a "sick joke" and says the international community is eying "tough sanctions" against Russia.
CNBC's Steve Sedgwick reports on the referendum in Crimea in which the region voted overwhelmingly to join Russia.
Marko Pavlyshyn, Director at Mykola Zerov Centre for Ukrainian Studies at Monash University, says Sunday's referendum in Crimea is the prelude to further destabilization in Ukraine.
Roger Groebli, CEO of Reyl Overseas, discusses recent volatility in global financial markets and ongoing instability in Ukraine.
Kenneth Polcari, Director at O'Neil Securities, explains why he thinks that calls for sanctions against Russia may not materialize.
Vasu Menon, Vice President, Wealth Management Singapore at OCBC Bank, explains why he thinks sanctions against Russia could take a diplomatic nature instead of punitive economic measures.
Myron Brilliant, Executive VP & Head of International Affairs at the U.S. Chamber of Commerce, explains how increased U.S. LNG exports could impact Russia's standoff with Ukraine.
Angela Stent, author of 'The Limits of Partnership: US-Russian Relations in the Twenty-First Century,' warns that attention will fall on Vladimir Putin as to whether Crimea will join Russia officially.
NBC's Richard Engel reports from the Crimean capital following the results of Crimea's referendum over the weekend.
Deb Clarke, Global Head of Investment Research at Mercer, explains how recent volatility in global financial markets could be buying opportunities for investors.
Jonathan Barratt, Chief Investment officer at Ayers Alliance Securities, explains why he doesn't expect oil prices to shoot up.
Ben Goldsmith, Associate Professor, Department of Government & International Relations at the University of Sydney and David Kuo, CEO at Motley Fool Singapore, debate whether sanctions are in the pipeline following Crimea's referendum.