South Africa: Current Issues, Economy, and U.S. Relations [Updated September 17, 2020] [open pdf - 2MB]
From the Summary: "South Africa, a majority black, multiracial country of nearly 60 million people, has cordial relations with the United States, notwithstanding periodic strains, and is the largest U.S. trade partner in Africa. President Cyril Ramaphosa took office in 2018, after a series of corruption scandals under the administration of his predecessor, Jacob Zuma. Zuma, elected in 2009, resigned under intense pressure in early 2018, shortly after then-Vice President Ramaphosa was elected to replace Zuma as leader of the African National Congress (ANC), South Africa's dominant party. The ANC has held a parliamentary majority since the first universal suffrage elections in 1994, which marked the end of apartheid, a system of codified state racial bias favoring whites, but is facing headwinds. In the last general elections, in May 2019, it earned 57.5% of the vote--its lowest margin ever."
CRS Report for Congress, R45687
Congressional Research Service: https://crsreports.congress.gov/