Daily on Defense Weekly Briefing: ‘Mad Dog’ Mattis for defense secretary?

In Monday’s Daily on Defense Weekly Briefing, Jamie McIntyre, Gabby Morrongiello and David Brown discuss the buzz around President-elect Trump’s possible choice of retired Marine Gen. James Mattis for defense secretary.

They also discuss Trump’s plans for the week, the perspective retired Army Gen. Jack Keane could bring to the administration, and an interesting take on Trump’s Islamic State plans from “Saturday Night Live.”

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