Pedzisa mutsara unotevera: Musi wa12 June 2008, pakaitwa referendamu yekubvumidzwa kwechibvumirano cheLisbon. Ikoku kwakakundwa, noruzhinji rwa 46.6% kusvika ku53.4%. Musi wa15 October 2009, imwe
referendamu yechipiri yakaitwa pamusoro pekubvumidzwa kwayo, iyo yakabvumidzwa ne67.1% kusvika ku32.9%.