Florida Congressman Byron Donalds endured not one, but two public humiliations in a single day after social media roasted him over a misspelled word on a literacy campaign sign and a rival gubernatorial candidate confronted him outside a campaign event with a megaphone. Donalds, who is running to replace Gov. Ron DeSantis, first found himself at the center of an online pile-on after launching a reading initiative while standing in front of a sig…