Via Religion Clause, the Justice Department's filing with the 7th Circuit appealing a judge's ruling that the National Day of Prayer is unconstitutional is being attacked by conservative groups for "not going far enough." The Family Research Council's Tony Perkins explains:

The President's attorneys failed to cite any of the key cases that would require immediate dismissal of this lawsuit because the plaintiffs lack standing to bring it. FRC plans to mount a robust defense of this important national event that a liberal judge has attempted to scrub from the public square

The FRC argues that they should therefore be allowed to participate in oral argument.You can read the DOJ appeal here. The FRC motion is here.