The resurgence of white supremacists groups in the US is a disquieting but unmistakable sign of a setback for equality
It was an ugly incident unlike anything seen in presidential politics in decades. Trump denied any responsibility for the clash.
His rallies often attract small groups of protesters, but Friday's was the first at which there may have been as many protesters as supporters.
The filmmaker spoke on the topic during the LACMA’s Art + Film Gala.
'Racism, we are not cured of it,' Obama said. 'And it's not just a matter of it not being polite to say nigger in public. That's not the measure of whether racism still exists or not. It's not just a matter of overt discrimination. Societies don't, overnight, completely erase everything that happened 200 to 300 years prior.'