Back in December 2012, after Hillary Clinton suffered a head injury in a fall, many conservative talking heads scoffed and suggested that she was just delaying her impending appearance before a House committee investigating the terrorist attack at Benghazi three months earlier.

Mrs. Clinton, who was secretary of state at the time of the attack, later appeared before the committee and demonstrated that she had no lingering effects of the injury or its treatment.

Yet, some conservatives are now convinced that Mrs. Clinton suffered injury to the extent that it adversely could affect her ability to run for president in 2016 or serve afterward.

GOP strategist Karl Rove suggested that Mrs. Clinton had suffered brain damage, noting that she emerged from treatment wearing glasses that supposedly are prescribed only for people who have suffered brain injuries. Mr. Rove, who is not a doctor and should not even play one on TV, also noted that Mrs. Clinton would be 69 in 2016, and 77 eight years later.

Mr. Rove's sniping is unfortunate. Voters should indeed be entitled to relevant information about candidates' health, but it shouldn't be based on uninformed speculation from the likes of Mr. Rove or any other political hatchet man.