. . . "PSP\u2013US" . . "Socialist Unity" . . . . . . . . . . . "PSP" . . . . . . . . . . . . . . . . "People's Socialist Party" . "People's Socialist Party (Spain)" . . . . "1968" . . . . . . . . . . . . "Popular Socialist Party" . . . . "People's Socialist Party (Spain)" . . . . . . . . . . . . . . . . . . . . . . . . "1978" . . . "People's Socialist Party\u2013Socialist Unity" . . . "Socialist Party of the Interior" . . . . . . . . . .