312 U.S. 496 (1941) Cited 2,941 times 4 Legal Analyses
Holding that federal courts should ordinarily abstain where the resolution of a federal constitutional issue may be rendered irrelevant by the determination of a predicate state-law question
Holding that where plaintiffs assert the "depriv[ation] ... of rights protected by the Fourteenth Amendment ... [s]uch claims are entitled to be adjudicated in the federal courts"
Holding that union could not expel member because he filed unfair labor practice charge against it without first exhausting internal remedies as provided in union constitution
376 U.S. 149 (1964) Cited 237 times 1 Legal Analyses
Holding regulations affecting antecedent rights are not to be given retroactive effect absent an "unequivocal" manifestation the regulations were meant to be applied retroactively