Not a 1936 Cadillac. That year the Cadillac had more ribs on bumpers and wider impact guards. More likely its a 1936 LaSalle [companion car to Cadillac] - 70% sure. The single split in the rear bumper certainly fits that year butI don't see a hood mascot nor the double-split rear window.
Agree on 1936 La Salle . Yes the rear window is double split.It is not a Buick .La Salles of 1936 had typical hood louvres with five small rectangles but unfortunately those are not visible here to confirm.