Second, criminal blackmail excludes legal processes.

Third, she didn't threaten trump, she tried to sell her story after he lied to her about being a contestant on the apprentice.

https://www.scrofanolaw.com/federal-blackmail-and-extortion/

https://www.nytimes.com/2023/03/19/nyregion/trump-stormy-dan...

I’m not exactly what you mean when you say that “criminal blackmail excludes legal process,” but if you mean that threatening to go to the police with evidence of a crime if the criminal does not give you something of value, you are absolutely mistaken.

Threatening to go to the police without seeking something of value for your silence is certainly legal, but the moment you try to sell your silence you’re going to be wandering around in the vicinity of extortion.

They're saying that "If you don't pay me $X, I'll tell your wife I slept with you" is not illegal, so it doesn't constitute criminal blackmail.