Well...as of NOW someone took my sign..
Probably neight or down road who has a “dump trump” sticker on her mailbox.
Is that legal?
Stealing your sign is not legal, of course, but I doubt the cops would do anything, unless you have the perp(s) on film. Your neighbor’s sign on the mail box is verboten, but if the Post Office hasn’t done anything, no one else will, either, I suppose.