Throughout the movie, the SS referred to the President's movements, imminent arrivals, departures etc, using the codename 'Classic', and later, in Toronto, as 'Apache'. I was under the impression that the codename for any incumbent President is always 'Flashlight'...
I've seen things you people wouldn't believe...
Just in case anyone is till wondering,
"The White House Communications Agency assigns each member of the first family a code name for Secret Service agents to use during their time in the White House."
https://www.businessinsider.com/secret-service-codenames-presidents-of-the-united-states-first-ladies-children-stories-2019-3
https://www.britannica.com/list/secret-service-code-names-of-11-us-presidents