Oceania has always been at war with it's most evil of enemies, Eastasia, but don't forget we also have everlasting peace with Eastasia... so all's good.
Most of the stuff I've seen on authoritarianism says that 30-33% is kind of the minimum threshold of public support for an autocracy to continue governing.
So yeah, this is still more than enough support for that, and I don't think it would dip much or at all if Trump cancelled elections and proclaimed himself King.