President Barack Obama said the United States has not overcome its history of racism and is using the N-word to make his case. In an interview, Obama weighed in on the debate over race and guns that has erupted after the arrest of a white man for the racially motivated shooting deaths of nine black church members in Charleston, South Carolina. “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...