This faction ended up leaving the SWP in 1958 after supporting the suppression of the Hungarian Revolution of 1956, a position contrary to that of the SWP and other Trotskyist tendencies. It went on to form the Workers World Party. Meanwhile, throughout the 1950s and into the 1960s the remaining membership of the SWP clung to its firmly held beliefs and grew older. Consequently, the party membership shrank over these years from a postwar high in 1948 until the tide began to turn in the early 1960s. The Cuban Revolution signaled a change in the SWP's political direction as it embarked on pro-Castro "solidarity work" through the Fair Play for Cuba Committee. The result was a small accretion of youth to the party's ranks. In the same period longtime SWP leader Murry Weiss won another group of youth from the Shachtmanites as they joined the Socialist Party of America. Many of the new recruits were drawn from the student movement, unlike those who had led the party since the 1930s; as a result the party's internal culture began to change. Despite such growing signs of an end to the isolation the group endured during the McCarthyite period, it experienced a new split in the early 1960s. A factional situation developed in the SWP that saw a number of small oppositional groups develop. One of the key issues was the Cuban Revolution and the SWP's response to it. Cannon and other SWP leaders such as Joseph Hansen saw Cuba as qualitatively different from the Stalinist states of Eastern Europe. Their analysis brought them closer to the International Secretariat of the Fourth International (ISFI) from which the SWP had split in 1953. The SWP successfully negotiated a reunification of the ISFI and the International Committee of the Fourth International leading to the creation in 1963 of the reunified Fourth International. Two sections of the ICFI, including Gerry Healy's Socialist Labour League, rejected the merger and turned against the SWP leadership, working with opponents within the party. The most important faction opposing the SWP leadership's new line was the Revolutionary Tendency (RT) led by James Robertson and Tim Wohlforth that rejected the SWP's "capitulation" to Pabloism and opposed joining the USFI. They were critical of the Castro government, arguing that Cuba remained a "deformed workers' state". However, a split developed within this faction between groups headed by the two men. Nonetheless, both the RT and the Reorganized Minority Tendency split to form the Spartacist (see Spartacist League) and the American Committee for the Fourth International respectively, with the latter becoming aligned with Healy's SLL.