Herschel Walker, the Republican nominee for Senate from Georgia, who has often spoken out against absentee fathers, particularly in Black households, on Tuesday publicly acknowledged having fathered a second son with whom he is not in contact. The admission came in response to a report by The Daily Beast, which said it had confirmed the 10-year-old boy’s parentage but withheld his name and that of his mother. It said the child’s mother had sued Mr. Walker a year after giving birth to obtain a declaration of paternity and child support, and that the suit lasted until August 2014, when Mr....