Senate Minority Leader Aquilino "Koko" Pimentel III has written a letter to Senate President Francis "Chiz" Escudero emphasizing the constitutional mandate requiring the Senate to act “forthwith” on the impeachment case of Vice President Sara Duterte.

In a letter dated Feb. 14, Pimentel cited Article XI, Section 3, paragraph 4 of the 1987 Constitution wherein the much-debated phrase "trial by the Senate shall forthwith proceed" can be found.

According to Pimentel, since it is a constitutional provision or term that's being given meaning to, the term “forthwith” must be interpreted in accordance with the Verba Legis Rule, that is, it should be given its “plain and ordinary meaning”.

"According to the Merriam Webster Online Dictionary, “forthwith” means “without any delay” or “without interval of time”. Its synonyms include immediately, instantaneously, instantly, presently, promptly, right away, right now, straight off, and straightaway, among others," he said in the letter.

He added that the Filipino translation for “forthwith” is “agad” which conveys immediacy. The synonyms of this Filipino word include “madali,” “bigla,” “dagli,” or “karakaraka” which denote urgency or promptness.

"The above elaboration affirms that it is the Senate’s duty to act on the impeachment case of Vice President Sara Duterte “without any delay” or “without interval of time.” I repeat that this is the Senate’s DUTY," he stressed.

Pimentel stated that given the gravity of impeachment proceedings, it is imperative that the Senate uphold its duty with urgency, diligence, and a steadfast commitment to the Constitution. He told reporters that the letter has been received by Escudero's office.