By David Ariosto, CNN
(CNN) - Pennsylvania's state Supreme Court has taken up a controversial case over the state's new voting law, which requires voters to show a photo ID before casting their ballots.
Court spokesman Art Heinz said the case, which is an appeal from a lower court's August 15 decision which upheld the law, is not expected to be resolved by Thursday.
At issue is whether the new requirement will disenfranchise voters during an election season that has already seen a series of high-profile legal challenges over voting procedures.
The law's opponents say the measure undermines potential voters and was passed without sufficient evidence of prior identity fraud.
Its proponents argue that the law instead strengthens voting procedures and protects against potential fraud.
Gov. Tom Corbett, a Republican, said the law, which he signed in March and was passed largely along party lines, "sets a simple and clear standard to protect the integrity of our elections."
After the hearing, Pennsylvania Deputy Secretary of State Shannon Royer said, "It was clear by the lower court ruling that this law is absolutely constitutional.
"Many other states around the country have voter ID laws. Pennsylvania's voter ID law was modeled after Indiana, which was implemented back in 2008 and upheld on solid legal ground. And I'm hoping based on my observations of the justices today, that they'll come to the same conclusions," Royer added.FULL STORY