What Newsom has done definitely gets underneath Trump's skin, but who is he trying to appeal to? I suspect it's Republicans, and it won't work. Voters already see Trump as ridiculous. What they want is someone who speaks to them and understands their needs. Newsom isn't doing that.
In emulating Trump, even to make fun of him, he's walking into the same trap as other pols who tried. The biggest mistake politicians make is trying to play Trump's game. They need to take a page from Wargames:
I see Newsom and Pritzker working as complements to each other. Newsom is shining a light on the ridiculous pass the press has given trump, hopefully inviting greater scrutiny, and Pritzker is the one taking action. Ds need a full court press.