Guns and mental health

Mental illness is at the heart of recent mass shootings, including last month’s massacre at University of California, Santa Barbara.  Rep. Mike Thompson,  D-Calif., is proposing a new bill to enhance law enforcement’s power in keeping guns out of the hands of the mentally ill.  Chris talks with the congressman about the realities of getting effective gun legislation passed and whether anything could have prevented these shootings. Thompson joins MSNBC’s Chris Jansing to discuss.