unless Trump really lost it it would appear he is working on an insanity defense .... "President Trump"...
I believe it is customary in the USA to continue referrring to retired presidents and vice-presidents by their title.
People still say president Clinton, president Bush, president Obama and indeed president Trump.
Most former presidents do not really stand on the protocol (is it protocol, or just custom?), but then Trump was not quite like former presidents.
The first thing to remember is always treat your kite like you treat your woman.
Get inside her five times a day and take her to heaven and back!
Lord Flashheart, 1989