During the swearing-in of new Defense Secretary James Mattis, President Trump also signed two new executive orders.
The orders covered two of his favorite topics from the campaign trail: national defense and immigration.
According to Trump, these new orders pave the way for more defense spending and tougher immigration procedures.
Military spending usually isn't a problem for Congress. Legislators recently authorized almost $619 billion in defense spending.
But it's not clear how much more extreme U.S. refugee vetting can get — the current procedures are already pretty rigorous.