Let’s take a trip via the wayback machine to the hallowed classrooms of the University of Chicago Law School. The year is 1996, and a young lecturer named Barack Obama is teaching constitutional law to a group of students. His first final exam question is about whether homosexuals can be barred from receiving state health care coverage for their infertility treatments. The question deals with a hypothetical lesbian couple that wants to have a baby. Their state prevents health providers from providing infertility treatments for unwed couples; the couple’s state-provided healthcare therefore refuses them coverage for such procedures Obama then...