A federal appeals court declined to revive a challenge to an Illinois law that requires would-be candidates for Cook County offices to collect more voter signatures than their counterparts seeking statewide office.The 7th U.S. Circuit Court of Appeals rejected the argument that the disparity between the voter support candidates for various offices needs in order to get on the primary ballot violates the U.S. Constitution.The Cook County signature requirement is justified by Illinois’ interest in orderly and fair …