Military.com

Here is one article discussing the one day TFR, there was another article I read that went into more detail on how the ex-Pres has to request it:

“The military and the Federal Aviation Administration have already set up temporary flight restriction areas, or TFRs, which are used as no-fly zones while the president is in the air. TFRs are supported by North American Aerospace Defense Command and the Air Force. Air Force fighters such as F-15 Eagles or F-16 Fighting Falcons are tasked with addressing airspace violations -- either escorting the aircraft out of the TFR, or, in extreme cases, shooting it down.

Aircraft are prohibited from flying within a 30-mile radius of Mar-a-Lago while Trump is visiting, a restriction that has been in place since he took office. The FAA has already issued its TFR for Wednesday over Palm Beach beginning at 10:45 a.m.”