President Biden "remains a healthy, vigorous 78-year-old male who is fit to successfully execute the duties of the Presidency," White House physician Dr. Kevin O'Connor wrote in a memo to White House press secretary Jen Psaki Friday. But O'Connor also took note of a couple of issues evident in the president's health profile after the completion of Mr. Biden's routine physical Friday morning. O'Connor noted that there has been an increase in the frequency of Mr. Biden's coughing during public speeches. He has always coughed, O'Connor said, but the coughing has become "more frequent and pronounced" over the last few...