Perhaps you should read the entire opinion at the link. The judge did use law and case precedent.
> The judge did use law and case precedent.
Only in regard to determining if the case is justiciable.
In regard to “natural born citizen” he relies on articles: “A ‘Natural Born Citizen’ Within the Meaning of the Constitution” by Breckinridge Long, “Who can be President of the United States, the Unresolved Enigma” by Charles Gordon, “Qualifications for President and the ‘Natural Born’ Citizenship Eligibility Requirement” by Jack Maskell, “On the Meaning of ‘Natural Born Citizen’” by Paul Clement and Neal Katyal, “Why senator John McCain cannot Be President” by Gabriel Chin, and “Is Gov. George Romney Eligible To Be President” by Isidor Blum.