During the first two decades of Lebanon's independence, the LCP enjoyed little success. In 1943, the party participated in the legislative elections, but failed to win any seats in the Chamber of Deputies. The LCP ran for election again in 1947, but all of its candidates were defeated and the party was outlawed in 1948. During the 1950s, the party's inconsistent policies on Pan-Arabism and the Nasserite movement cost it support and eventually isolated it. The party was active against the government during the 1958 uprising. In 1965, the LCP decided to end its isolation and became a member of the Front for Progressive Parties and National Forces, which later evolved into the Lebanese National Movement (LNM) under Druze leftist leader Kamal Jumblatt. In the mid-1960s, the U.S. State Department estimated the party membership to be approximately 3,000.