You must not have read the entire article I cited. Several people were officially involved in the call who weren't cleared for classified information, thus it couldn't be classified.
You can't dictate which agency is responsible for an investigation in an executive order. Those determinations are dictated by the Constitution, and legislation. It should be the FBI or a general investigation by the DOJ for this, whether it is over classified info or the Espionage act. There was no financial or cyber involved. It can't be under the Secret Service's per view.
Yeah, I'll take Bradley P Moss, Steven Vladeck, and other cited attorneys opinion over yours. I'm not wrong. We'll see whether this investigation even gets started, much less completed. I'll laugh my ass off if it gets canned over the secret service starting the investigation illegally. I'm sure the advisors won't let it go that far though. If they start the investigation, I'm sure it would be with the DOJ or FBI. You realize that any kind of investigation that gets started, no matter who takes it up, will likely get halted as soon as Biden takes office? Nobody's gonna continue this trumped up crap, that they know is trumped up, after Trump leaves DC. It won't even take any influence from Biden for something like that to stop.