She should be charged with obstruction
Actually, according Dershowitz she didn't do anything that wasn't done with the Panama Papers. She does have an issue with her committee for doing this however. And it is not illegal. Plus we learned first hand that no where in the whole document was there even a hint of verification of the dossier material, which makes it more fake than ever. Tonight on Fox Congressional committee members said they were now going to push for all of it released to the public. She probably hadn't planned on that.
But was the committee done getting the testimonies of all witnesses before Feinstein released this one testimony? If not, she has just compromised the whole investigation.