Blanco started his career in politics as a journalist, director of local newspaper La Tribuna and owner of Diario de Costa Rica, principal newspaper at the time, where he directed his major political campaigns.
Главным образом работал как журналист, был директором газеты La Tribuna и собственником Диарио де Коста Рика, в которых он пропагандировал свои политические взгляды.