Intense Exchange between Don Lemon and Katrina Pierson as she's asked to explain Donald Trump's position on a "complete shutdown" of Muslims entering the U.S. FAIR USE NOTICE: This video contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes..