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The Eastern Cape - the birthplace of anti-apartheid icon Nelson Mandela - has been worst-affected by the icy conditions, along with KwaZulu-Natal province.

During the tense meeting, Trump played footage from political rallies in which participants sang "Kill the Boer" - a controversial anti-apartheid song that critics say calls for violence against white farmers.

Ramaphosa promised to champion unity, invoking the name of anti-apartheid icon Nelson Mandela - the symbol of racial reconciliation in South Africa after the end of white-minority rule in 1994.

The song was once an anti-apartheid anthem, and Afrikaner lobby groups have tried to get it banned.

The footage on the large screen showcased South African political firebrands chanting "Shoot the Boer", an anti-apartheid song.