nearly two million members. It won 39 seats (out of 257), and 80 out of 514 in the Constituent Assembly. Almost 30 percent of the votes in East Java were cast for the PKI. Struggle against capitalism Opposition to continued Dutch control of Irian Jaya was often raised by the party during the decade, and the PKI office in Jakarta experienced a grenade attack in July 1957. The party made advances in municipal elections that month, and in September the Islamist Masyumi Party demanded that the PKI be banned. On 3 December, trade unions largely under PKI control began seizing Dutch-owned companies. These seizures paved the way for the nationalization of foreign-owned businesses. The struggle against foreign capitalism gave the PKI an opportunity to profile itself as a national party. By the mid 1950s, the PKI had a reputation of being one of the least corrupt parties in Indonesia. Officials in the U.S. were becoming concerned that it might be difficult to defeat the PKI in elections, as they were well organized and spoke to the needs of the people. Said Richard Nixon, vice president at the time: "a democratic government was [probably] not the best kind for Indonesia." PRRI rebellion A coup attempt was made by pro-U.S. forces in the military and the political right wing in February 1958. The rebels, based in Sumatra and Sulawesi, proclaimed a Revolutionary Government of the Republic of Indonesia (Pemerintah Revolusioner Republik Indonesia) on 15 February. The revolutionary government immediately began arresting thousands of PKI members in areas under their control, and the party supported Sukarno's efforts to quell the rebellion (including the introduction of martial law). The rebellion was eventually defeated. Nasakom In August 1959 there was an attempt on behalf of the military to prevent the PKI's party congress. The congress was held as scheduled, however, and was addressed by Sukarno. In 1960, Sukarno introduced "Nasakom": an abbreviation of nasionalisme (nationalism), agama (religion) and komunisme (communism). The PKI's role as a junior partner in the Sukarno policy was institutionalized; the PKI welcomed Nasakom, seeing it as a multi-class united front. Guided democracy Although the PKI supported Sukarno, it retained its political autonomy; in March 1960, the party denounced the president's undemocratic handling of the budget. On 8 July of that year, Harian Rakyat carried an article critical of the government. The PKI leadership was arrested by the army, but was later