He is so above protocol.
Check it out:

As he disembarked from his U.S. Marine Corps helicopter in New York, today, the president returned a formal military salute with a sloppy and careless salute while wielding a coffee cup, prompting some to dub it the “latte salute.”

Not seeing a problem, the president’s aides published the video on his Instagram account.

ABC excused the sloppy salute, saying, “while it is protocol for U.S. service members in uniform to salute the commander in chief, it’s not required for a civilian president to salute back, military experts say.”

Ronald Reagan is said to have begun the practice back in 1981.

Whether or not it’s “protocol” to do something that has been the practice for over 30 years, it is official protocol to execute a salute properly.