The biggest mistake I notice with non-native speakers is verb conjugation, especially with future tense. This may be because I hang around a lot of Vietnamese ESL people, idk. For example, “I go” instead of “I am going” is a common mistake I see.
For natives, the biggest mistake is misspellings and a lack of punctuation. Occasionally you’ll also see excessive punctuation and run-on sentences.
Because Trump is very deeply popular with a huge voter block. Going against him means he’ll just point those people at you and say “this guy’s bad, also probably a pedophile or some shit idk” and then your career is over.