Scott Walker is out but he couldn’t even be classy enough to bow out gracefully. He had to take a swipe at Trump on his way out, and encourage others to drop out to unify the anti-Trump vote as well. At least he further reinforced the contention that Trump is the candidate that the ruling class most loathes and fears.
Seriously, is your withdrawal announcement really the time to swipe at another candidate? It’s a time to congratulate your opponents who are staying in the race and wish them well. Firing off parting shots at them (or one in particular) is whiny and comes off as sour grapes.