Pressure is growing on South Africa's president to step down. Jacob Zuma's supporters and critics held rival marches outside the African National Congress headquarters in Johannesburg. Critics held signs saying "Zuma must fall" while his supporters led a "Hands Off Zuma" demonstration, calling for the president to remain in power until his term ends next year. The ruling party said no march should undermine the ANC's powers to appoint and recall its own leaders. Senior party members will hold an emergency meeting on Monday to discuss Zuma's future.