President Donald Trump has used a White House meeting to confront South African President Cyril Ramaphosa with baseless claims of the systematic killing of white farmers in that country.

A visit by President Cyril Ramaphosa of South Africa to the White House took a contentious turn on Wednesday as President Trump showed him videos intended to back up Mr. Trump’s false claim that there have been mass killings of Afrikaners, a white ethnic minority that once led the nation’s apartheid government.