Yet another investigation has determined that, contrary to claims by "birthers," there is no doubt that President Obama was born in the United States. The latest inquiry into Mr. Obama's birthplace, conducted by CNN in a report that airs tonight on AC360, concludes that "Obama was born in Hawaii on August 4, 1961. Period." Doubt surrounding Mr. Obama's American citizenship has been thoroughly debunked by multiple sources since the issue arose on the 2008 campaign trail. Still, the matter has resurfaced in recent months, thanks in large part to Donald Trump's recent "birther"-friendly media blitz, in which he has repeatedly...