IE 11 is not supported. For an optimal experience visit our site on another browser.

Donald Trump set to announce new appointments as Joe Biden hints at 2020 run

03:06

Vice President Joe Biden startled reporters on Capitol Hill when he hinted at a possible presidential run in four years. Meanwhile, President-elect Donald Trump is getting set to announce that retired Gen. James “Mad Dog” Mattis will be his pick for defense secretary. NBC’s Kristen Welker reports for TODAY.