“Don’t mess with Texas” is a homespun aphorism that expresses a genuine sentiment. Texans, and to a slightly lesser degree, Wyomingites, are independent cusses. They’re proud of their states and their beliefs, and pushed too far don’t whine about why government isn’t making things right. They handle it themselves and vote the useless weasels out at the next electoral opportunity. One such weasel is long-serving Texas Senator John Cornyn. Once thought a reliable Republican, he forgot which state he represents and stepped on a known Texas land mine: gun control. In Texas, weakness on the Second Amendment and cruelty to...