Horthy appointed Pal Teleki prime minister in July 1920. Teleki's government resigned, however, after the former emperor, Karl IV, unsuccessfully attempted to retake Hungary's throne in March 1921. King Karl's return narhed a split parties between conservatives who favored a Habsburg restoration and nationalist right-wing radicals who supported election of a Hungarian king. Bethlen, a nonaffiliated, right-wing member of the parliament, took advantage of this rift by convincing members of the Christian National Union who opposed Karl's reenthronement to merge with the Smallholders' Party and form a new Party of Unity with Bethlen as its leader. Horthy then appointed Bethlen prime minister.