I have a feeling Howard doesn't see Trump coming on the show anymore, but still wants to keep that bridge unburned for personal reasons. I did really notice when Robin did the news Monday, and she doesn't even mention the Muslim ban until halfway through...and Howard's like "Hmm. Anything else Robin?" Possibly one of the biggest, craziest political maneuvers in US history and he had nothing to say besides I told him not to run, and shoved to the back of the news? Well, they made sure to hammer home that the only people from the show who wanted him elected were the Wack Pack, Sal & Ronnie the Limo Driver...possibly the only comment you need to make about this.
I saw that Roger is nearly neighbors with Howard in the Hamptons, maybe that has something to do with it?