The judiciary branch is being tested. The feel is Team Trump will bulldoze the judiciary branch whenever they feel like it.
And it looks like the Department of Justice will either be a rubber stamp or be gutted.
Senator Feinstein was explicit about this concerning Sessions for Attorney General:
“We’re being asked to vote on a nominee that will have to stand up to a president who is clearly willing to ignore the law and even issue orders that are in violation of the Constitution,”