Civil rights groups promised to file a lawsuit challenging the new law. Louisiana has become the first state to require that the Ten Commandments be displayed in every public school classroom, the latest move from a GOP-dominated Legislature pushing a conservative agenda under a new governor.The legislation that Republican Gov. Jeff Landry signed into law on Wednesday requires a poster-sized display of the Ten Commandments in “large, easily readable font” in all public classrooms, from kindergarten to state-funded universities.“If you want to respect the rule of law, you’ve got to start from the original lawgiver, which was Moses” who got the commandments from God, Landry said.Opponents questioned the law’s constitutionality and vowed to challenge it in court.