New York Attorney General Eric Schneiderman said on Thursday he would lead a multi-state legal challenge to the U.S. Federal Communications Commission vote to reverse landmark the 2015 net neutrality rules.

Schneiderman, a Democrat, said in a statement that states “will sue to stop the FCC’s illegal rollback of net neutrality.”

The American Civil Liberties Union also pledged a court fight after the 3-2 vote and a trade group representing companies like Facebook Inc and Alphabet Inc said it opposed the reversal and was weighing legal options.

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(Reporting by David Shepardson; Editing by Meredith Mazzilli)