Like our military, the Secret Service, Border Patrol, ICE, VA, etc will be cleaned out, rebuilt and put under new management and leadship.
And we use hundreds of billions saved from coddling tens of millions of illegals, and from useless government departments, programs etc., to fund it.
Trump need not worry—with his supporters around him at a rally—he has thousands of guards who will protect him from any would be assassin. I even bet, some of his followers would take a bullet for him. Any attacker would be ripped to pieces by the mob. USA isn’t France—never will be.