Res judicata "is not limited to only claims that were actually litigated." Merced v. Ponte, No. 17-CV-4918 (KAM), 2019 WL 1208791, at *9 (E.D.N.Y. Mar. 13, 2019), aff'd, 807 Fed.Appx. 127 (2d Cir. 2020). Rather, "it bars all legal claims that a party could have raised in the prior litigation."
It is well-settled that Article 78 proceedings constitute "an adjudication on the merits" for purposes of a res judicata analysis. Merced v. Ponte, 2019 WL 1208791, at *7 (E.D.N.Y. Mar. 13, 2019) (citing Bray v. New York Life Ins., 851 F.2d 60, 63-64 (2d Cir. 1988)). Moreover, Miller's constitutional claims seeking declaratory relief arise out of the "same transaction or series of transactions" as those at issue in his Article 78 proceeding and thus could have been raised in his Article 78 proceeding.