Maybe it would be good if Ivanka did because when they go after her, and she certainly did not send secret government documents, then they will have to go after the witch.
President Trump should express outrage over this sort of thing. He should demand an broad investigation, going back at least 10 years, finding all federal employees who might have engaged in such behavior. He should prioritize the most serious cases and push for full prosecution under the law.
In a ranked list, the investigation of Hillary would start tomorrow. We can find time to investigate Ivanka in about 2035.