Today has seen a lot of accusations about Trump "hate", but the level of dislike for Erickson seems to be right up there, and pretty heated. Seems like a double standard, yes?
A quick google search of a few keywords yielded articles written by Erickson in which he said he was going to give Trump a chance, urged NeverTrumpers to do the same, etc. In fact, the leading paragraph of the article linked above reads like this:
"I tend to take these stories about the President with a grain of salt. We have seen key details of a number of salacious stories retracted within 48 hours. The media hates the President so much that they’ll run a negative story about him without very much provocation. Anti-Trump sources embedded within the administration in the career civil service, etc. will leak to the press and confirmation bias sets in."
What's the problem, then? Erickson pretty much takes the same tack as Ben Shapiro and Jonah Goldberg, among others...he's fair with his criticism and his praise.