When CJ and Josh talk about pranks conducted by the departing administration, Josh remarks that on his first day, he needed a crowbar to open the drawer on his desk. However, in "Debate Camp" in Season 4, we see flashbacks that show that Josh does not have a desk at all on his first day.
When Josh asks Sam to quit private practice and serve as deputy chief of staff, among the reasons Sam cites for his reluctance to return to the White House is that his fiancée, also an attorney, would have to retake the bar exam to practice law in D.C. The D.C. Bar admits already-practicing attorneys from other states without requiring them to take a new bar exam, provided that they graduated from a law school accredited by the American Bar Association and that when they took their original bar exam, they received a high enough score on the Multistate Bar Examination and multi-state legal ethics exam (multiple-choice tests used by many states as part of their bar exams). DC's admission requirements are common knowledge among lawyers on the East Coast, and both Sam and Josh should have known better.
A key plot component involves the NSA not only intercepting but reporting the content of a phone call made by the president-elect, an egregious felony. Yet the White House staff and incoming president simply accept it.