re: #199 HappyWarrior
I contend this. Trump has a lower ceiling than presidents like Obama, Bush, or Clinton but he has a higher ceiling since his core supporters will support him no matter what.
I think the ultimate floor for any president is probably somewhere around 25%. There will always be devout partisans on each side that will back their guy no matter what. The ultimate ceiling is probably around 90%, that’s where GW Bush ended up after 9/11.