https://ag.ny.gov/press-releases
James, who has been in office for 13 months, has been one of the lead AG's on most of the lawsuits filed by states against the Trump administration since she was elected. She also put his bogus private foundation out of business.
She also has responsibilities for a lot of things that have nothing to do with Trump, but are important to New Yorkers.
Do you have any specifics on the financial crimes that she (or Manhattan DA Vance, more likely) could be prosecuting right now involving the 'Trump kids', where NY has jurisdiction? If they're doing investigations right now, I doubt that they would be broadcasting any of that in advance. And if any of the crimes involve Trump himself, even indirectly, or foreign governments, the cases will undoubtedly wind up/be slowed down in federal court on a variety of issues, as Vance's current Trump cases have. Election day will arrive sooner.
Trump has to be voted out. No kind of clever silver bullet is likely to get him out of office at this point.
(Also, I don't think that they would prosecute the 'Trump kids' primarily for the purpose of making some kind of deal with Dad Trump for him to resign to protect them. Among other things, he simply would never do so.)