(Best of the Tube: Catch us talking politics on “The Journal Editorial Report.” Fox News Channel 3-4 p.m. ET Saturday, with a repeat showing Sunday at 3 p.m.) Well, it’s official: President Obama was born in the United States.

You might have thought that any lingering doubt about that question was erased 5½ years ago, when the president obtained and released his long-form birth certificate from the state of Hawaii. But America’s journalistic guard dogs still had questions.

In...