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For Fact's Sake: A wall won’t work

04:37

With less than 100 days to go until midterm elections, President Trump is ramping up rhetoric over immigration and is now threatening a government shutdown if he doesn’t get money for his border wall. For Fact’s Sake, Ali Velshi and Stephanie Ruhle will explain why a wall is not an effective way to crack down on undocumented immigration. Weighing in: NBC News Politics Senior Editor, Beth Fouhy.