Secretary of State Hillary Clinton encouraged South Africa to press for reform in Zimbabwe and said the US would build closer ties with Pretoria after strains under the Bush administration.
Before meeting South Africa's foreign minister today, Mrs Clinton said she would urge the new government to get Zimbabwe to raise the pace of political reform which has been too slow for donors to release substantial amounts of aid.
"South Africa is very aware of the challenges posed by the political crisis in Zimbabwe because South Africa has three million refugees from Zimbabwe," Mr Clinton told a news conference after meeting International Relations and Cooperation Minister Maite Nkoana-Mashabane.
"And every one of those refugees represents a failure of the Zimbabwean government to care for its own people and a burden that South Africa has to bear," she added.
The United States, troubled by what it sees as an absence of reform in Zimbabwe, has no plans either to offer major development aid or to lift sanctions against President Robert Mugabe and some of his supporters.
Before sanctions can be lifted or major aid can flow, Washington wants more evidence of political, social and economic reforms by Mr Mugabe and the government he shares with opposition leader and now Prime Minister Morgan Tsvangirai.
New South African President Jacob Zuma, due to meet Mrs Clinton in Durban tomorrow, has taken a harder line on Zimbabwe than his predecessor Thabo Mbeki, but the United States wants more.
"There needs to be renewed effort to make sure that the reform agenda is followed up on," Mrs Clinton told a group of South African business leaders in Johannesburg.
Mrs Clinton hopes there will be a burst of goodwill due to the change of government in both South Africa and the United States and that it will lead to better relations with Pretoria than the Bush administration had.
Ms Nkoana-Mashabane said coordination with the previous US administration had been poor and she wanted to "elevate" the relationship with the Obama team. She also promised South Africa would try to get Zimbabwe to move faster in introducing reforms.
A senior US official said earlier that "US-South African relations were not as warm and friendly in reality as many people thought" when President Thabo Mbeki was in power.
The United States had disagreed, for example, with Mbeki's questioning of established scientific understanding of HIV/AIDS.
Earlier today, Mrs Clinton, on an 11-day trip to Africa, met former president Nelson Mandela at his foundation in Johannesburg, and was given a tour of his personal archives.
Reuters