Donald Trump is planning to take an 18th-century law meant to target wartime aggressors and use it to embark on a massive program of deportations, insiders in his camp have revealed. The three sources told Rolling Stone his camp is developing “legally dubious justifications” to use the Alien Enemies Act against undocumented immigrants. The law was introduced in 1798 to target foreign governments’ acting against the U.S. during wartime. The lawyer, who has been a frequent adviser to Trump for years, told Rolling Stone the scheming about how to use it against immigrants is “very convoluted and c…