The problem is that any anti-Obamalamadingdong bumper sticker will be asking for your car to be trashed. Unfortunately the Left doesn’t want dissent. It’s unpatriotic. It’s terrorism.
Which is why, I ALWAYS post my NRA and some local gun shop stickers as well. As a HAM radio OP I also have 3-4 antennas on my vehicle. Seriously I have accidentally left it unlocked in some scary areas and, funny thing is, it was untouched. Even I was shocked about that! Good Luck!