Long before the Kennedys became synonymous with Hyannis Port, Georgetown, Palm Beach, and Manhattan’s Upper East Side, the family’s New York roots were firmly planted in Riverdale. Now, one of the Bronx’s most intriguing estates is back on the market with a $500,000 price reduction. Listed for $5.85 million by Dustin Crouse and Erin Boisson Aries of Douglas Elliman, the sprawling property at...