WASHINGTON (AP) — The foundation tasked with selecting a location for President Barack Obama’s presidential library is adding Obama’s half-sister and one of his top former political advisers to its board of directors.

The additions of the president’s half-sister Maya Soetoro-Ng (SOH’-eh-tor-oh ENG) and former adviser David Plouffe (pluhf) to the Barack Obama Foundation board come as it is evaluating site proposals. The board hopes to announce a decision in early 2015.