Unless he himself becomes president, Donald Trump should serve in the next administration as Special Envoy for Getting People to Dig Up Birth Certificates for Public Consumption, because he's hella good at it. His speculation about Obama's birthplace prompted the President to release his long-form birth certificate in 2011. And now, after only a few days of muttering about Cruz's eligibility to become president, he's prompted Cruz to release… his mother's? Wait, it makes sense. As best we can tell there are two main strands of Cruz birtherism. One is that the Supreme Court has never directly ruled on the...