Trump must really be on target and hurting the progressives a bunch for so may pantywaist media types to be going after him with all the mud and name calling they can gather.
Trump is monopolizing the news cycle. His message is getting out. Illegal immigrants have become Illegal immigrants again much to the chagrin of the left. The leftist press keep putting Trump on hoping that one of their snipes will wreck his candidacy. They are coming off as small and petty, while Trumps message is being heard loud and clear.
Worse for the left Trump is showing Americans they don't have to be afraid to speak the truth. That more than anything has them scared to death. We can't have the rabble feeling enabled to speak the truth.