Congressional candidate Joseph P. Kennedy III’s twin brother, Matthew Rauch Kennedy , married Katherine Lee Manning in Hyannis Port over the weekend. Guests included Matthew’s uncle Robert F. Kennedy Jr. and his significant other, Cheryl Hines of “Suburgatory” and “Curb Your Enthusiasm” fame. Matthew Kennedy and Manning announced their engagement on Jan. 1. He’s the director of strategic partnerships at the US Department of Commerce in Washington, D.C. According to the announcement, she a director in public affairs at The Glover Park Group in Washington, D.C. Joseph Kennedy III is still engaged to his longtime galpal Lauren Anne Birchfield . According to the New York Daily News, Joseph was Matthew’s best man.