U.S. Secretary of State Hillary Clinton (L) and South Africa's President Jacob Zuma attend a photo call after a brief meeting in Durban, August 8, 2009. Clinton encouraged South Africa on Friday to press for reform in Zimbabwe and said Washington would build closer ties with Pretoria after strains under the Bush administration.

Jacob Zuma, leader of South Africa's ruling African National Congress (ANC), sings for his supporters at the Pietermaritzburg high court outside Durban August 4, 2008. Zuma appeared in court on Monday to push for the dismissal of a corruption case that could stop him becoming president next year. Over 1,000 supporters demonstrated outside the high court in Pietermaritzburg to denounce charges they say are politically motivated and to try to stop Zuma from being put on trial later in the year.

South Africa's President Jacob Zuma and his wife Thobeka Madiba Zuma are seen at the G20 summit in Hamburg, Germany July 7, 2017.

South Africa's President Jacob Zuma holds up a banknote bearing the face of former president Nelson Mandela in Pretoria February 11, 2012. Zuma on Saturday announced the launch of new notes bearing the image of Mandela to coincide with the 22nd anniversary of Mandela's release from prison. Reuters/Stringer

Jacob Zuma, the newly elected leader of South Africa's ANC, dances a traditional zulu dance during a low-key marriage ceremony in front of his fourth wife, Nompumelelo Ntuli, in his KwaZulu-Natal homeland January 5, 2008. Traditional Zulu culture allows him to take more than one wife.

South Africa's President Jacob Zuma celebrates with his supporters after he survived a no-confidence motion in parliament in Cape Town, South Africa, August 8, 2017.

U.S. President Barack Obama (L) meets with South Africa's President Jacob Zuma at the annual G8 Summit in L'Aquila, July 10, 2009.

Former South African President Nelson Mandela (C) and his wife Graca Machel (R) talk to President Jacob Zuma after the state-of-the-nation address in Parliament, Cape Town June 3 2009. South Africa must act now to minimise the impact of the global financial crisis on the poor, but still has to spend wisely, President Zuma said on Wednesday.

President of South Africa Jacob Zuma gestures as he sings to his supporters at the 54th National Conference of the ruling African National Congress (ANC) at the Nasrec Expo Centre in Johannesburg, South Africa December 16, 2017.

South African President Jacob Zuma (L) and FIFA president Sepp Blatter arrive for the 2010 World Cup draw in Cape Town December 4, 2009. The month-long soccer tournament begins on June 11 next year in South Africa.

President Jacob Zuma dances at a victory rally of his ruling African National Congress (ANC) in Johannesburg May 10, 2014. The ANC won the 2014 national election with 62.16 percent of the votes, according to a provisional tally of Thursday's balloting.