Like most people, I had discarded the issue about President Obama's birth certificate long ago as without merit. Recently, though, possible Republican presidential contender Donald Trump has renewed public interest in the matter, and so I decided to take a second look. While Trump is mistaken in some particulars, to my surprise, the matter turns out to be more complicated than I originally thought. Obama defenders say that the he did release his birth certificate, making the entire argument moot. That is true ... sort of. In June 2008, the Obama campaign released of a "certification of live birth," which...