Between 1866 and 1907, the Dominican Republic is disputed between bicameral and unicameral, eliminating the Senate in the constitutional amendment of 1866, restoring it in 1878, and returning it to eliminate in 1880. The Senate reappeared as house of Congress in the Constitution of 1908, from which the bicameral system remained constant. During the first US intervention, Congress was dissolved not before elected president Francisco Henriquez y Carvajal. After the restoration of national sovereignty, Congress was again restored, and in 1927 the election of legislators were allowed by direct vote.