What was that about "states' rights"?
In July, the Committee issued subpoenas to the Attorneys General of New York and Massachusetts concerning state investigations under state law in state court, to a private law firm that has represented state and local governments and private parties in environmental litigation, and to several environmental organizations.
The Committee’s investigation and the state government and private investigations are not concurrent investigations of the same questions; the Committee is investigating the investigations. The initial stated purpose for the Committee’s subpoenas was to determine if the state proceedings unconstitutionally abridged ExxonMobil’s freedom of speech to deny climate change, and to protect ExxonMobil’s rights in the proceedings.
Bolding mine. Congress really has turned into a circus under Republican leadership. Or maybe a better metaphor is "flea market." You see something you want, quote me a price. But this one is really over the top: