Howard Buffett, Warren’s oldest son, has become a crusader at the border, using his organizations and wealth to boost security efforts of local authorities and volunteer groups, according to a recent report. While his interest in border security may seem odd, a closer look at the 64-year-old billionaire and philanthropist reveals he’s no stranger to the issue. Buffett owns a ranch in Cochise County, Arizona, that sits just 300 yards from the U.S.-Mexico border. In addition, a report by The Phoenix New Times indicated a close relationship between Buffett and law enforcement, with the former reportedly gifting $30 million to...