On 9 June, parliamentary elections were held in Bulgaria for the sixth time in just over two years to coincide with the European elections, because GERB-SDS and PP-DB were unable to agree in March to continue their cooperation in the government by changing the prime minister after nine months. The incumbent Prime Minister Nikolai Denkov of PP-DB was to be replaced by Maria Gabriel of GERB, but this did not materialise due to internal contradictions within PP-DB.