On Thursday, Connecticut Gov. Dannel Malloy announced plans to issue an executive order barring anyone listed on federal terrorist watch lists from purchasing a gun in the state. But while the idea of “no fly, no gun†has found growing support following the mass shooting in San Bernardino last week, including that of President Obama, experts say such a policy may be unconstitutional. The problem lies with the terrorist watch lists themselves, which are both secret and routinely updated without the typical due process given to those who are accused of breaking the law, such as court proceedings. Without a...