Something happened with Obama and it hasn't un-happened.

They must have found that their readers/watchers don't like to hear them bashing the left. Likely because it highlights their stupidity and their fragile egos can't take it, so it's turned off. Lose a reader/ viewer = bad for business.

Meanwhile centrists don't care and right wingers probably weren't watching/reading them much anyway. So it's easy to bash Bush or Trump as their audience gets to feel smug and like they're on the "right side of history" or whatever. Dopamine hit, keep tuning in next week for more!