The conflict between Borisov and Vuchkov, the prime minister's longtime fellow GERB party member and political ally, centered around the appointments of Vladimir Pisanchev, head of the State Agency for National Security, and Svetozar Lazarov, the Interior Ministry's secretary. Both officials have been in office since 2013, when they were appointed by the previous Socialist-led government. Borisov wanted to allow the two officials to retain their posts, but Vuchkov disagreed. Nevertheless, after Vuchkov's resignation, Borisov announced that he would replace both officials, who ultimately resigned March 6. The top post at the security agency is a significant one in Bulgaria. The agency, which has been under investigation for allegedly conducting illegal and politically motivated wiretapping, serves as Bulgaria's counter-intelligence body.