cabinet positions formerly held by the Nationalists, with Mbeki becoming sole Deputy President. Inkatha remained part of the coalition, and when both Mandela and Mbeki were out of the country in September 1998, Buthelezi was appointed "Acting President", marking an improvement in his relationship with Mandela. Although Mandela had often governed decisively in his first two years as president, he had subsequently increasingly delegated duties to Mbeki, retaining only a close personal supervision of intelligence and security measures. During a 1997 visit to London, he said that "the ruler of South Africa, the de facto ruler, is Thabo Mbeki" and that he was "shifting everything to him". Mandela stepped down as ANC President at the party's December 1997 conference. He hoped that Ramaphosa would succeed him, believing Mbeki to be too inflexible and intolerant of criticism, but the ANC elected Mbeki regardless. Mandela and the Executive supported Jacob Zuma, a Zulu who had been imprisoned on Robben Island, as Mbeki's replacement for Deputy President. Zuma's candidacy was challenged by Winnie, whose populist rhetoric had gained her a strong following within the party, although Zuma defeated her in a landslide victory vote at the election. Mandela's relationship with Machel had intensified; in February 1998, he publicly stated that he was "in love with a remarkable lady", and under pressure from Tutu, who urged him to set an example for young people, he organised a wedding for his 80th birthday, in July that year. The following day, he held a grand party with many foreign dignitaries. Although the 1996 constitution allowed the president to serve two consecutive five-year terms, Mandela had never planned to stand for a second term in office. He gave his farewell speech to Parliament on 29 March 1999 when it adjourned prior to the 1999 general elections, after which he retired. Although opinion polls in South Africa showed wavering support for both the ANC and the government, Mandela himself remained highly popular, with 80% of South Africans polled in 1999 expressing satisfaction with his performance as president. Retirement Continued activism and philanthropy: 1999–2004 Retiring in June 1999, Mandela aimed to lead a quiet family life, divided between Johannesburg and Qunu. Although he set about authoring a sequel to his first autobiography, to be titled The Presidential Years, it remained unfinished and was only published posthumously in 2017. Mandela found such seclusion difficult and reverted to a busy public