Only recently he was not pro-Trump..
Dershowitz: It's Been Harder For Me To Get On "Anti-Trump Networks" Like CNN
Harvard law professor emeritus Alan Dershowitz said he is no longer invited by "anti-Trump network" CNN in an interview with on C-SPAN's 'Washington Journal.'
DERSHOWITZ: More and more I'm getting called on only by people who misunderstand and think I'm pro-Trump. I'm not pro-Trump, but it's been harder for me to get on anti-Trump networks, not that I'm craving to be on television all the time...
I used to be, for example, on CNN more often than on FOX. I was a regular, not paid, just a person who was on all the time debating with [Jeffrey] Toobin, debating with others. I haven't been on CNN, now, since the summer. FOX calls me all the time.
Dershowtiz was anti-trump but also anti-witchhunt and would not spout the narrative required by CNN and the other Democratic PACS that try to pass as media. So he became a non-guest, non-contributor overnight.