For a couple of reasons:
The left is always on war mode. One tactic is to constantly fire off ridiculous propaganda to try by sheer volume to wear us down. Next up will be numerous fake expert commentary that ‘Trump can’t win’. Many weak conservatives will be dupes for that one. These are the people who I am sure you know who can’t still accept the last election was stolen. That can’t happen in the bestest country there ever was.
The beltway people hate an outsider like Trump so much they are delusional with rage. Crap about ‘Trump weakening. Losing big in key races’ is what they have to tell themselves