Kimberly McLaughlin v. Suzan McLaughlin

In Tuan Anh Nguyen v. I.N.S., 121 S. Ct. 2053 (2001), this Court has held that a statute that differentiates based on gender will be upheld if it bears a “fair and substantial relationship to legitimate state ends.” Despite finding that A.R.S. § 25-814, as written, applies exclusively to men, the Arizona Supreme Court found the statute violated the Fourteenth Amendment because it treats similarly situated people different. Did the Arizona Supreme Court err when it held that a biology-based paternity statute violates the Fourteenth Amendment and this Court’s decisions in Obergefell and Pavan?