[2] Seitz determined that segregation was intrinsically discriminatory but that the Supreme Court forbade a ruling on such a basis in Plessy v. Ferguson and Gong Lum v. Rice: "[W]hile State-imposed segregation in lower education provides Negroes with inferior educational opportunities, such inferiority has not yet been recognized by the United States Supreme Court as violating the Fourteenth Amendment.
[3] Despite this limitation, Chancellor Seitz ruled that conditions were unequal, and that the only remedy that could suffice was integration.
Seitz was nominated by President Lyndon B. Johnson on February 28, 1966, to a seat on the United States Court of Appeals for the Third Circuit vacated by Judge John Biggs Jr.
[5] A brother, John F. R. Seitz, was a career United States Army officer who served as a colonel in World War II and retired at the grade of major general.
[6] In January 2025, President Joe Biden named Seitz as a recipient of the Presidential Citizens Medal, along with nineteen others.