It’s unusual, to be clear, for federal authorities to take this kind of action when federal funding is not involved, and the SPLC does not accept government grants. That’s because the attorney general for the relevant statenormally handles litigation against charities suspected of wrongdoing.

And it’s atypical for federal or state authorities to step in on behalf of a nonprofit’s donors without citing any complaints from specific donors.

Trump administrations indictment of the Southern Law Center Poverty Law Center breaks with norms

Good explanation of what is different about this case.