Former first lady Barbara Bush uses a walker as she leaves a luncheon at the Kennebunk River Club on her 90th birthday, Monday, June 8, 2015, in Kennebunkport, Maine. Bush family members, including her son, former Florida Gov. Jeb Bush, who is expected to announce his presidential run next week, are in Kennebunkport for her birthday on Monday. (AP Photo/Robert F. Bukaty)