Justice White takes the approach that, once the state undertakes to enforce a support obligation, it cannot violate EP. [He seems to obfuscate the statutory and common law obligations and treat the Texas law as a mass.]
Miller, R.I. Preliminary Memorandum, Gomez v. Perez, 409 U.S. 535 (1973). Box 367, Harry A. Blackmun Papers, Manuscript Division, Library of Congress, Washington, D.C.