Harold Wilson imprisoned for fraud, and Sir Eric Miller, who later committed suicide while under police investigation for corruption. The Labour Party held an election to replace Wilson as leader of the Party (and therefore Prime Minister). Six candidates stood in the first ballot; in order of votes they were: Michael Foot, James Callaghan, Roy Jenkins, Tony Benn, Denis Healey and Anthony Crosland. In the third ballot on 5 April, Callaghan defeated Foot in a parliamentary vote of 176 to 137, thus becoming Wilson's successor as Prime Minister and leader of the Labour Party, and he continued to serve as Prime Minister
Prime minister and in British colonial territories as they developed self-government. In some places alternative titles such as "premier", "chief minister", "first minister of state", "president of the council" or "chancellor" were adopted, but the essentials of the office were the same. By the late 20th century, the majority of the world's countries had a prime minister or equivalent minister, holding office under either a constitutional monarchy or a ceremonial president. The main exceptions to this system have been the United States and the presidential republics in Latin America modelled on the U.S. system, in which the president directly exercises executive authority.