Texas Gov. Greg Abbott said on Tuesday his administration will sue to block the Pentagon’s vaccine mandate for the Texas National Guard. “As the commander-in-chief of Texas’s militia, I have issued a straightforward order to every member of the Texas National Guard within my chain of command: Do not punish any guardsman for choosing not to receive a COVID-19 vaccine,” Abbott wrote in a letter to Maj. Gen. Tracy Norris, Adjutant General of the Texas Military Department. Abbott, a Republican, added that his “order has been in effect for months now, President [Joe] Biden has muddied the waters with a vaccine mandate from the U.S. Department of Defense,” according to his letter. “Unless President Biden federalizes the Texas National Guard in accordance with Title 10 of the U.S. Code, he is not your commander-in-chief under our federal or state Constitutions,” Abbott wrote to Norris. Abbott’s announcement of a lawsuit comes days …