The first political party in Trinidad and Tobago with a continuing organization and program--the People's National Movement (PNM)--emerged in 1956 under Dr. Eric Williams, who became Prime Minister upon independence and remained in that position until his death in1981. Politics have generally run along ethnic lines, with Afro-Trinidadians supporting the PNM and Indo-Trinidadians supporting various Indian-majority parties, such as the United National Congress (UNC) or its predecessors. Most political parties, however, have sought to broaden their purview.

The PNM remained in power following the death of Dr. Williams, but its 30-year rule ended in 1986 when the National Alliance for Reconstruction (NAR), a rainbow party aimed at Trinidadians of both African and Indian descent, won a landslide victory by capturing 33 of 36 seats. Tobago's A.N.R. Robinson, the NAR's political leader, was named Prime Minister. The NAR also won 11of the 12 seats in the Tobago House of Assembly. The NAR began to break down when the Indian component withdrew in 1988. Basdeo Panday, leader of the old United Labor Front (ULF), formed the new opposition with the UNC. The NAR's margin was immediately reduced to 27 seats, with six for the UNC and three for the PNM.

In July 1990, the Jamaat al Muslimeen, an extremist Black Muslim group with an unresolved grievance against the government over land claims, tried to overthrow the NAR government. The group held the prime minister and members of parliament hostage for 5 days while rioting shook Port of Spain. After a long standoff with the police and military, the Jamaat al Muslimeen leader, Yasin Abu Bakr, and his followers surrendered to Trinidadian authorities. In July1992, the Court of Appeal upheld the validity of a government amnesty given to the Jamaat members during the hostage crisis. Abu Bakr and 113 other Jamaat members were jailed for two years while other courts debated the amnesty's validity. All 114 members were eventually released after a ruling by the U.K. Privy Council.

In December 1991, the NAR captured only the two districts in Tobago. The PNM, led by Patrick Manning, carried a majority of 21 seats, and the UNC came in second. Manning became the new Prime Minister and Basdeo Panday continued to lead the opposition. In November 1995, Manning called early elections, in which the PNM and UNC both won 17 seats and the NAR won two seats. The UNC allied with the NAR and formed the new government, with Panday becoming prime minister--the first prime minister of Indo-Trinidadian descent. Elections held in December 2000 returned the UNC to power when they won 19 seats, while the opposition PNM won 16, and the NAR 1. The UNC government fell in October 2001 with the defection of three of its parliamentarians, and the December 2001 elections resulted in an even 18 to 18 split between the UNC and the PNM. President Robinson invited PNM leader Manning to form a government before the end of the year, but the inability to break the tie delayed Parliament from meeting. Prime Minister Manning called elections in October of 2002. The PNM formed the next government after winning 20 seats, while the UNC won 16. Both parties are committed to free market economic policies and increased foreign investment. Trinidad and Tobago has remained cooperative with the United States in the regional fight against narcotics trafficking and on other issues.