After three straight wins, is Donald Trump now unstoppable in the race for the Republican presidential nomination? And the debate in South Africa over teaching in Afrikaans.

After three straight wins, is Donald Trump now unstoppable in the race for the Republican presidential nomination? And the debate in South Africa over teaching in Afrikaans.

Picture: Donald Trump speaks in Las Vegas, Nevada, flanked by sons Donald Jr and Eric.

Credit: Ethan Miller / Getty Images.