The letter comes just a month after the Food and Drug Administration said abortion pills can be offered at retail pharmacies.
A coalition of states is filing suit against the Department of Justice for the "cruel and unlawful" border policy.
GOP legal advisors say the investigation "threatens free speech."
Anti-abortion groups are attacking California Attorney General Kamala Harris for doing her job.
"Companies that deceived investors and consumers about the dangers of climate change ... must be held accountable," says Massachusetts AG.
"It'll block decision-making in a manner that's so nearly unprecedented, it's not justified."