She didn't attack him, she did her job. The president comes out and gives his view how everything is great. We all know that is not true. To what degree we can argue over. It is then the job of the press to ask the hard questions (mostly negative) to get the other side of the story. He only wants positive questions. Anything else he attacks as being fakenews, unfair, nasty among other things. He is just a big baby.
It’s not their job to attack and criticize exclusively, they can ask fair questions and say something positive for a change. There was nothing to be gained from a journalistic perspective from that question. They can mention that testing has been a positive, instead of finding a way to use it as a cudgel.
Agreed about the big baby part, and that it’s not true that everything is great.