He is a founder and leader of the Muslim Bosniak Organization (MBO).[citation needed] At the beginning of the Party of Democratic Action (SDA, est. 1990), the party also included a very influential secular nationalist grouping, led by Adil Zulfikarpašić and Muhamed Filipović.[3] He led a delegation and negotiated both with presidents of Croatia and Slovenia republics in SFRY, who invited Bosnia to join them on the planned path to secession, and later in June 1991, on behalf of SDA president Alija Izetbegović, Zulfikarpašić and Filipović met with SDS president Radovan Karadžić, Nikola Koljević and Momčilo Krajišnik to discuss the future status of SR Bosnia and Herzegovina. He then met with representatives of Serbia who invited Bosnia to stay.