Some judicial observers are trying to predict how the Court will rule based on their questions during oral arguments Friday.
The Court has given no indication of when it will issue a ruling, though all nine justices, as well as the snack bar staff, were working over the weekend.
"I'd say they'd come out with something early next week," said Shapiro.
But perhaps more important than the verdict is how unified the court is behind its majority decision.
"The best possible outcome here is a unanimous decision. If it's a divided decision, and both sides remain as intemperate as they have been, then it will undermine the court's integrity in the people's eyes," said Gerken.
"My great fear is that, no matter what happens, the decision of the Supreme Court is attacked by one side or another," she said.