President-elect Donald Trump continued his "Thank You" victory tour on Tuesday, making a stop in North Carolina to tout his national security agenda and formally introduce his pick for Defense Secretary, retired Marine Corps Gen. James Mattis. Speaking in Fayetteville, N.C., Trump called Mattis the "living embodiment of the Marine Corps motto" — Semper Fidelis. "Mad Dog plays no games, right?" Trump asked, invoking the general's nickname, and added that the country was fortunate "that a man of this character and integrity will now be the civilian leader atop the Department of Defense."