The Fifth Circuit Court of Appeals has ruled the Texas Pledge of Allegiance does not violate the Establishment Clause. The State AG's office issues this news release:
In today’s ruling, the Fifth Circuit affirmed the lower court’s decision, ruling that the Texas Pledge “. . . is a patriotic exercise, and it is made no less so by the acknowledgement of Texas’s religious heritage via the inclusion of the phrase ‘under God.’”
The appeals court also denied the plaintiffs’ argument that the Texas Pledge endorses a particular religious belief. Rather, the ruling acknowledged: “A pledge can constitutionally acknowledge the existence of, and even value, a religious belief without impermissibly favoring that value or belief, without advancing belief over non-belief, and without coercing participation in a religious exercise. Texas’s pledge is of this sort and consequently survives this challenge.”
The phrase "Under God" was added to the Texas Pledge in 2007. You can read the opinion here.
