What would be an example of such criminal charges being brought by this administration? Is there a case that stands out as clear retaliation?

Edited to add: I can think of the mortgage fraud cases being discussed/brought against some high-profile people, but can’t think of any corporate world leadership being charged.

I wasn't thinking of this administration necessarily. There's been cases going back to IIRC the early 00s, for instance Joseph Nacchio.