london liberian president ellen johnson sirleaf say wednesday sadden fact u.s. voters elect woman president express concern president-elect donald trump policy toward africa would johnson sirleaf first woman elect head state africa say extremely sadden miss opportunity part people unite state join small democracies end marginalization women interview bbc television say liberia nation found 19th century free american slave long historical relationship unite state expect continue concern whether president-elect trump african agenda able build bridge africa hope due course worry trade deal liberia africa worry investment special program put place president obama president george bush know policy towards africa be liberia 's johnson sirleaf sadden concern trump win