National unity government disasters or wars, that the two parties have briefly "rallied around the President." Such instances include the attack on Pearl Harbor, the assassination of John F. Kennedy, and the September 11 attacks, all of which not only had a worldwide effect, but preceded a massive spike in the approval rating of the sitting President. The 2008–2009 Zimbabwean political negotiations between the opposition Movement for Democratic Change (led by Morgan Tsvangirai), its small splinter group, the Movement for Democratic Change – Mutambara (led by Arthur Mutambara), and the ruling Zimbabwe African National Union – Patriotic Front (led by Robert Mugabe) created
South Africa–Zimbabwe relations of economic sanctions against the government. However, whilst supporting democratic change in South Africa, Zimbabwean leader Robert Mugabe did not support the idea of Zimbabwe being used as a base for anti-South African guerillas. In the 2007 Zimbabwean political crisis, South African President Thabo Mbeki mediated with the MDC and ZANU–PF to form a unity government, and often remained silent on the issues in Zimbabwe, which drew criticism. Following a cholera outbreak in Zimbabwe, the ruling ANC in South Africa became impatient and urged the parties to form a unity government. On September 3, 1998, South African President Nelson Mandela