JOHANNESBURG—South Africa’s African National Congress (ANC), in power since apartheid ended in 1994, is being assaulted on two fronts, with salvos fired from inside the government, as well as from the United States.
At home, sentiment is growing that unless the ANC scraps laws the party’s secretary-general, Fikile Mbalula, calls “untouchable,” South Africa will not escape the worst effects of a high tariff imposed by U.S. President Donald Trump.