Politics of Tanzania takes place in a framework of a unitary presidential democratic republic, whereby the President of Tanzania is both head of state and head of government, and of a multi-party system. Executive power is exercised by the government. Legislative power is vested in both the government and parliament. The party system is dominated by the Chama Cha Mapinduzi (Revolutionary State Party) The Judiciary is independent of the executive and the legislature.

Full independence came in December 1961 and Julius Kambarage Nyerere (1922–1999), a socialist leader who led Tanganyika from colonial rule, was elected President in 1962. One of Africa’s most respected figures, Julius Nyerere was seen as a politician of principle and intelligence. Known as Mwalimu (teacher), he proposed a widely acclaimed vision of education.

From independence in 1961 until the mid-1980s, Tanzania was a one-party state, with a socialist model of economic development. Beginning in the mid-1980s, under the administration of President Ali Hassan Mwinyi, Tanzania undertook a number of political and economic reforms. In January and February 1992, the government decided to adopt multiparty democracy. Legal and constitutional changes led to the registration of 11 political parties. Two parliamentary by-elections (won by CCM) in early 1994 were the first-ever multiparty elections in Tanzanian history.

Coordinates: 6°18′25″S 34°51′14″E / 6.307°S 34.854°E / -6.307; 34.854 Tanzania, officially the United Republic of Tanzania ( /ˌtænzəˈniːə/ Swahili: Jamhuri ya Muungano wa Tanzania), is a country in East Africa bordered by Kenya and Uganda to the north, Rwanda, Burundi, and the Democratic Republic of the Congo to the west, and Zambia, Malawi, and Mozambique to the south. The country's eastern border lies on the Indian Ocean.

Tanzania is a state composed of 26 regions (mikoa), including those of the semi-autonomous region of Zanzibar. The head of state is President Jakaya Mrisho Kikwete, elected in 2005. Since 1996, the official capital of Tanzania has been Dodoma, where Parliament and some government offices are located. Between independence and 1996, the main coastal city of Dar es Salaam served as the country's political capital. Today, Dar es Salaam remains the principal commercial city of Tanzania and the de facto seat of most government institutions. It is the major seaport for the country and its landlocked neighbours.

The United States is a federal constitutional republic, in which the President of the United States (the head of state and head of government), Congress, and judiciary share powers reserved to the national government, and the federal government shares sovereignty with the state governments.

The executive branch is headed by the President and is independent of the legislature. Legislative power is vested in the two chambers of Congress, the Senate and the House of Representatives. The judicial branch (or judiciary), composed of the Supreme Court and lower federal courts, exercises judicial power (or judiciary). The judiciary's function is to interpret the United States Constitution and federal laws and regulations. This includes resolving disputes between the executive and legislative branches. The federal government's layout is explained in the Constitution. Two political parties, the Democratic Party and the Republican Party, have dominated American politics since the American Civil War, although other parties have also existed.

Barack Hussein Obama II (ⁱ/bəˈrɑːk huːˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the 44th and current President of the United States. He is the first African American to hold the office. In January 2005, Obama was sworn in as a U.S. Senator in the state of Illinois. He would hold this office until November 2008, when he resigned following his victory in the 2008 presidential election.

Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was the president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004.

Following an unsuccessful bid against the Democratic incumbent for a seat in the United States House of Representatives in 2000, Obama ran for the United States Senate in 2004. Several events brought him to national attention during the campaign, including his victory in the March 2004 Illinois Democratic primary for the Senate election and his keynote address at the Democratic National Convention in July 2004. He won election to the U.S. Senate in Illinois in November 2004. His presidential campaign began in February 2007, and after a close campaign in the 2008 Democratic Party presidential primaries against Hillary Rodham Clinton, he won his party's nomination. In the 2008 presidential election, he defeated Republican nominee John McCain, and was inaugurated as president on January 20, 2009. Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. In April 2011, he announced that he would be running for re-election in 2012.

Michelle LaVaughn Robinson Obama (born January 17, 1964) is the wife of the 44th and incumbent President of the United States, Barack Obama, and is the first African-American First Lady of the United States. Raised on the South Side of Chicago, Obama attended Princeton University and Harvard Law School before returning to Chicago and to work at the law firm Sidley Austin, where she met her future husband. Subsequently, she worked as part of the staff of Chicago mayor Richard M. Daley, and for the University of Chicago Medical Center.

Throughout 2007 and 2008, she helped campaign for her husband's presidential bid and delivered a keynote address at the 2008 Democratic National Convention. She is the mother of two daughters, Malia and Sasha, and is the sister of Craig Robinson, men's basketball coach at Oregon State University. As the wife of a Senator, and later the First Lady, she has become a fashion icon and role model for women, and an advocate for poverty awareness, nutrition and healthy eating.