On 6 April 2014, in the wake of the annexation of Crimea, Zeman called for strong action to be taken, possibly including sending NATO forces into Ukraine, if Russia tried to annex the eastern part of the country. Speaking on a radio show he said that, "The moment Russia decides to widen its territorial expansion to the eastern part of Ukraine, that is where the fun ends. There I would plead not only for the strictest EU sanctions, but even for military readiness of the North Atlantic Alliance, like for example NATO forces entering Ukrainian territory." The Czech Republic has been a NATO member since 1999, when Zeman was prime minister. In the Czech constitutional system it is the government that has the main responsibility for foreign policy, although the President is commander-in-chief of the armed forces. The ČSSD government of Bohuslav Sobotka resisted strong EU sanctions against Russia after the annexation, because of the negative economic impact such sanctions would have had on the country.