In 1938 he was again elected a member of the Philippine Assembly, and served as the Majority Floor Leader during this term.
Hernandez became a member of the first Philippine Assembly in 1907.
In 1905, he went to Spain as a delegate of the Philippine Assembly.
In 1907, he was elected as the Batangas representative and represented that town, among others, in the Philippine Assembly.
There would not be another attempt at national legislative election until the 1907 elections which established the Philippine Assembly.
They were aided by Philippine Assemblies of God missionaries and native Vietnamese workers.
In 1907, the Philippine Assembly was established and for the first time, five residents of Pangasinan were elected as its district representatives.
Aged 26 she delivered a speech at the Philippine Legislative Assembly arguing for women's rights.
While governor, he ran for election to the first Philippine Assembly of 1907 and was elected Speaker of that body.
From 1916 to 1922, he represented the second district of Pampanga in the Philippine Assembly for two terms.