Get a load of the latest “policy” proposals on immigration coming from Stephen Miller and the extreme white nationalists: AS HE CAMPAIGNS on a pledge to lead an unprecedented crackdown on legal and illegal immigration, former President Donald Trump has vowed to invoke an 18th-century wartime law to help fuel his massive deportation operations. According to three people familiar with the policy deliberations, Trump, his advisers, and allies have been developing legally dubious justifications and theories to give Trump what he would ostensibly need to wield the archaic law as a weapon against the undocumented if he’s elected president again. If Trump were to try to invoke the Alien Enemies Act for this purpose, it would almost certainly provoke court challenges, since the law is meant to target the actions of foreign governments and regimes during wartime, not alleged criminals, gangs, or non-state actors. One source familiar with the plans — a lawyer who has counseled Trump over the years — tells Rolling Stone the legal justifications under consideration by the ex-president and his associates are “very convoluted and crazy to me.” This attorney adds, “I really don’t know how you get away with this in court.” Still, the former president and some of his closest allies are determined to invoke the Alien Enemies Act and put these legal theories to the test, should Trump retake the White House. Trump’s public remarks on the matter have presented little detail about how, exactly, he and his government-in-waiting would circumvent the glaring legal obstacles. The three sources shed light on…