When told that Mr. Trumpf's birth certificate indicated that his race is Caucasian, the challenger whispered, "How do we know it's real?"

This week the media edged closer to their Murrow moment. In the 50s, CBS broadcaster Edward R. Murrow took on Sen. Joe McCarthy and his unscrupulous red-baiting, helping bring about McCarthy's downfall. And this week, the media finally began to call out Donald Trump's racism and point out the cowardice of those like Paul Ryan, who admitted Trump's comments about Judge Gonazalo Curiel were the "textbook definition of racism" -- and yet continued to endorse him. So the media edged closer to their Murrow moment, but they still have a long way to go, judging by their reaction to Trump's speech after winning the California primary. Only Donald Trump could be praised for a speech just because it did not include any overt racism. But whether he "pivots" to being "presidential" or not, we know what he thinks, and we know what "textbook" beliefs his policies are based on. "This is no time," said Murrow of McCarthy, "to remain silent." Nor to ignore or euphemize the grave danger we're facing.

Integrating immigrants as individuals and providing them with the means of upward mobility is what has distinguished America from the old world cultures of Europe. It is the foundation upon which America's celebrated aspirational culture has been built. To suggest otherwise in 2016 -- as Trump has done in questioning whether a U.S.-born judge of Mexican lineage can fairly try the case against Trump University -- is also to deny the mixed races and ethnicities that constitute America's makeup today. (continued)

Racism is still deeply rooted in American society and in white culture. Donald Trump has repeatedly taken the racism that is often covert and made it overt, what is usually implicit and made it explicit. Trump has regularly turned racial "dog whistles" into bullhorns.

The list keeps getting longer.