Dueling Demonstrations in Zimbabwe Over First LadyThere were dueling demonstrations in Zimbabwe’s capital Wednesday, for and against first lady Grace Mugabe. Members of the ruling ZANU-PF marched in Harare chanting songs to show support for first lady Grace Mugabe. They held placards written “Gabriella Engels is not an angel.” Engels is the South African model who accused Mugabe of assaulting her with an electrical cord two weeks ago at a Johannesburg hotel.\n\nThe first lady was expected at the march, but senior ZANU-PF official Manditawepi Chimene said she had other commitments. Chimene said, “We can not afford her to sleep outside her home. We have come here for our father and our mother,” referring to longtime president Robert Mugabe and his wife. “There is no way we are going to respect our father and ignore our mother,” she added That statement is an apparent reference to ongoing rivalry within the ZANU-PF. One faction supports Vice President Emmerson Mnangagwa to succeed Robert Mugabe, while another is backing Grace Mugabe to succeed her husband, who has ruled Zimbabwe since 1980. The first lady has not spoken publicly since she returned from South Africa. Controversial immunity Meanwhile in South Africa, Engels has filed a court challenge to Grace Mugabe’s diplomatic immunity, saying she had traveled to South Africa for medical treatment, not official business. On Wednesday, as the ruling party marched, a coalition of Zimbabwean opposition parties rallied outside the South African Embassy in Harare to protest Pretoria's handling of the alleged assault case. “Granting her immunity is saying political leaders can go anywhere in the world and assault people and get away with it because they have diplomatic immunity," said opposition activist Linda Masarira. "It [gives] a negative image on all Zimbabweans.” South Africa's main opposition party, the Democratic Alliance, last week filed papers with the nation's Constitutional Court asking the court to reject the decision to grant diplomatic immunity to Mugabe.\n\nIn a statement, the party said the move was "wholly without legal merit and should thus be declared unconstitutional and invalid."\n\nNo hearing date has been set for the case, but it could further strain Harare-Pretoria relations.