Donald Trump bragged throughout the presidential campaign that his team was small but effective. It is a lean approach some see him bringing to the White House as well, at least early on. And that is raising some concern.

For example, the President-elect has filled the top jobs on his National Security Council staff. But Julie Pace of the Associated Press reports that many of the NSC staff jobs remain vacant just days before the inauguration.

"The big-name jobs are obviously filled, but at the National Security Council and some of the other White House agencies people are expecting a lot of empty desks when he moves in on Friday," Pace said Sunday on CNN's "Inside Politics."

"Again, this isn't something that the public will always see. But these behind-the-scenes jobs at the White House are really crucial to keeping operations running, especially in crisis moments. "