Philippine Senate elections

[1] With the advent of the nominal multi-party system In 1987, political parties have not been able to muster enough candidates to fill their 12-person slate.

The first instance of having guest candidates was in 1955, when the opposition Liberals adopted Claro M. Recto of the Nacionalista Party, who had also opposed the presidency of Ramon Magsaysay.

[3] In 1935, the electorate approved in a plebiscite a new constitution that abolished the Senate and instituted a unicameral National Assembly of the Philippines.

[4] The electorate in 1940 approved in a plebiscite amendments to the constitution that restored the bicameral Congress of the Philippines, including the Senate.

With the 24 candidates with the most votes winning in the election, the ruling Nacionalista Party won all 24 seats in a landslide victory.

President Sergio Osmeña called for special sessions to convene the 1st Congress of the Commonwealth of the Philippines until elections could be organized.

[3] Electoral reform enacted in 1951 eliminated block voting, which had given voters the option of writing the party's name on the ballot.

"[5] On September 23, 1972, President Ferdinand Marcos declared martial law and assumed legislative powers.

In a 1973 plebiscite, the electorate approved a new constitution that abolished Congress and replaced it with a unicameral National Assembly, which would ultimately be the Batasang Pambansa (parliament).

There were suggestions that Davao City Mayor Sara Duterte, the president's daughter, substitute for dela Rosa.

The Senate, when it existed, met at the Old Legislative Building from 1918 to 1941, from 1949 to 1973, and from 1987 to 1997.
Map of the senatorial districts.
The Senate chamber at the Old Congress building: Cipriano P. Primicias, Sr. , far left, debates Quintín Paredes , far right. In the center are, from left to right, Justiniano Montano , Mariano Jesús Cuenco , Enrique B. Magalona , and Francisco Delgado . In the foreground is Edmundo Cea.
The GSIS building: The Senate session hall.