Does the due process clause apply to every law with retroactive effect?

The due process clause does not make unconstitutional every law with retroactive effect. Almost all new laws upset some expectations, and frequently changes are made in the legal consequence of prior conduct. Only when such retroactive effects are so wholly unexpected and disruptive that harsh and oppressive consequences follow is the constitutional limitation exceeded. See, e. g., Welch v. Henry, 305 U.S. 134, 146-51, 59 S.Ct. 121, 83 L.Ed. 87 (1938).