The University of Minnesota Libraries has begun digitizing Spanish American texts of a political nature in its collections, The Spanish American Political Texts. At this point this digital library is small (6 titles), but the plan is to enlarge it.
If you have any difficulties accessing it, feel free to contact me at firstname.lastname@example.org.
Rafael E. Tarragó
Librarian for Iberian, Ibero-American & Chicano Studies
University of Minnesota Libraries