Watch for this ... the media will be want to continue to refer to him as President Obama, which is normally done when making a casual reference to an ex-president, but ONLY when it doesn’t involve the current president.
So we’re going to read a lot of reports like:
President Obama today criticized President Trump ....You underestimate the depths to which the Ministry of Propaganda Media has sunk.
Expect this instead:
President Obama Excoriates Businessman 'donald trump'; Experts Agree With Criticism.
LOL ... you’re probably right, even with the lowercase d.t., except they’ll put the quotes around “Businessman” I think.