MSNBC Live with Tamron Hall 09/18/15

Trump under fire over Muslim Q&A

Donald Trump is taking heat for laughing off a supporter's controversial statement about Pres. Obama during a Q and A in New Hampshire. NBC's Katy Tur reports, plus Republican Strategist Mercedes Schlapp and Democratic Strategist Robert Zimmerman weigh in. ... more Duration: {{video.duration.momentjs}}