O’Melveny & Myers this month became the latest major law firm to open a practice group dedicated to pushing back against scrutiny by state attorneys general.

The firm has had a front row seat to the threat posed by committed state attorneys general—especially when they opt to target a company or industry in unison. O’Melveny is lead litigation counsel for Johnson & Johnson as the company fights off more than 2,000 lawsuits relating to the opioid crisis; many of those suit were launched or sparked by the states.