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letting up. >> i'm donald trump and i approved this message. >> reporter: laujing this morning, donald trump's first tv ad. >> she's calling for a temporary shutdown of muslims entering the united states until we can figure out what is going on. >> reporter: including building the wall. >> that mexico will pay for. >> reporter: and ending with the signature line. >> great again. >> reporter: clinton attacking that very phrase this weekend in her first campaign stop of 2016. >> you can't make america great