The impeachment defense of President Trump is not the first time Alan Dershowitz and Kenneth Starr have agreed. In 2006, they both blurbed my book, Lawyers' Poker: 52 Lessons That Lawyers Can Learn from Card Players:
"Lubet deals a winning hand with this entertaining and creative approach to gamesmanship. Anyone who negotiates, strategizes or bluffs–and who doesn't–will benefit from this great read. You won't be able to keep a poker-face when you read this funny and informative book." — Alan M. Dershowitz, Felix Frankfurter Professor of Law, Harvard
"Steven Lubet creatively weaves together two ostensibly unconnected worlds. Highlighted by anecdotes from some of the greatest arguments in American trial history, coupled with memorable hands in the World Series of Poker, Lawyers' Poker provides illuminating insights into strategic decisions in courtrooms and card tables across America." — Kenneth W. Starr, Dean and Professor of Law, Pepperdine University School of Law
As far as I know, that had no influence on their current alignment.