Normal Things the President Can't Do When in Office

Nothing… if we’re being technical

“An important final point is one that’s often overlooked—although the Secret Service can advise, and, in some cases, strongly discourage, they ultimately answer to the president,” says Ronan. “Therefore, if a president wants to do something that raises security issues, such as walking out of the White House to greet people or visiting a dangerous location, the president has the final say and the Secret Service will try its best to adapt to the circumstances.”