It's a truism in politics that labels matter. When President Barack Obama and his Democratic allies in the Senate and House passed healthcare reform legislation in 2010, they developed an official name for the law that they thought would convey the positive benefits of the bill: "Patient Protection and Affordable Care Act." That name has often been shortened to "Affordable Care Act" in the years since its passage, but the bill has also come to be known as "Obamacare," a name frequently used by Obama himself. Others simply call it the healthcare law. The political news site Politico called...