Kimberlé Crenshaw - Professor at Columbia Law School

The United States of America is a republic divided. The Trump presidency has exposed fissures that run along lines of race, gender, education and culture. In November's mid-term elections, the fight for political power will be between the two traditional parties - Republican and Democrat, but perhaps a different sort of activism is needed to deliver real change. Stephen Sackur speaks to Kimberlé Crenshaw who is a professor of law, a social activist and an influential advocate of the idea of intersectionality. Is it the group, not the individual, that matters most in today's America?