The U.S. Justice Department has filed an appeal against the ruling by a Wisconsin Judge who said the annual Day of Prayer event is unconstitutional.
Some legal analysts believe the case could go all the way to the Supreme Court.
Meanwhile, the army is considering disinviting Evangelist Franklin Graham from speaking at the Pentagon's National Day of Prayer event.
Some muslims have protested because of comments Billy Graham's son made in the past calling Islam "wicked" and "false."
Graham told Fox News on Thursday that he stands by remarks he's made, but that he loves the muslim people.
"I want them to know that they don't have to die in a car bomb, don't have to die in some kind of holy war to be accepted by God. But it's through faith in Jesus Christ and Christ alone," Graham said. "But when you look at Islam, I love the people of Islam but the religion, I do not agree with the religion at all. If you look at what the religion does for just to women, women alone, it is just horrid."
Graham also said it is up to the military to decide if he will speak at the prayer event on May 6.