I would be happy to buy several “He’s NOT my President” bumper stickers!
Tee shirts too, if they have ‘em!
Perhaps you could use a Sharpie and make the ears a little bigger and skin darker.
However, the stark reality, just as it was for the Bush Haters, is that whomever is in the White House is your President as is recognized by 99% of the American People as well as the military and everyone in the Legislative and Judicial branches.