Nine years after the Supreme Court said colleges and universities can use race in their quest for diverse student bodies, the justices have put this divisive social issue back on their agenda in the middle of a presidential election campaign.

Nine years is a blink of the eye on a court where justices can look back two centuries for legal precedents. But with an ascendant conservative majority, the high court in arguments Wednesday will weigh whether to limit or even rule out taking race into account in college admissions.

The justices will be looking at the University of Texas program that is used to help fill the last quarter or so of its incoming freshman classes. Race is one of many factors considered by admissions officers. The rest of the roughly 7,100 freshman spots automatically go to Texans who graduated in the top 8 percent of their high school classes.

A white Texan, Abigail Fisher, sued the university after she was denied a spot in 2008.

The simplest explanation for why affirmative action is back on the court's calendar so soon after its 2003 decision in Grutter v. Bollinger is that the author of that opinion, Sandra Day O'Connor, has retired. Her successor, Justice Samuel Alito, has been highly skeptical of any use of racial preference.

Justice Anthony Kennedy, a dissenter in the 2003 decision, probably holds the deciding vote, and he, too, has never voted in favor of racial preference.