Texas Attorney General Ken Paxton took aim at the push to restrict gun rights by President Joe Biden, who on the Feb. 14 anniversary of the Parkland shooting called on Congress to impose tougher laws on ownership of firearms. “The Parkland shooting 3 years ago was an act of unspeakable evil,” Paxton wrote in a tweet late Sunday. “But Democrats cannot be allowed to use this tragedy as an opportunity to cram down unhelpful and unconstitutional gun laws. “Biden won’t undo the #2A in TX on my watch,” the Republican attorney general added, referring to the Second Amendment. Sunday marked three years since former Marjory Stoneman Douglas High School student Nikolas Cruz opened fire at the Parkland, Florida, campus, killing 17 people and leaving another 17 wounded. Biden took the opportunity to call on lawmakers to enact what he called “commonsense gun law reforms.” This includes background checks on all gun …