Opinion: The nation loses its grip on civility

Ruben Navarrette: Sen. Markwayne Mullin , R-Oklahoma, and union president Sean M. O'Brien exchanged insults at a Senate hearing.

He says it's not far-fetched to label them a natural outgrowth of a society in which verbal and written taunts are all too common.

The rest of us need to act if civil society truly does truly unravel before civil society does, he says.