[8][9] Robles served as a delegate to the 1971 Philippine Constitutional Convention as a representative of the 1st district of Quezon.
In 2009 though, the "five-year rule" was scrapped by the council thus Robles became eligible as a Supreme Court justice nominee.
[10] On January 23, 2018, Robles was appointed by President Duterte as a member of the Consultative Committee tasked on reviewing the 1987 Constitution of the Philippines.
[4] His nomination, though, was deferred by the Commission on Appointments after being grilled on several issues, including the country's arbitral award over the South China Sea dispute.
[2] Senator Panfilo Lacson later claimed that some of his answers "disappointed the members of the foreign affairs committee".
[14] He arrived in Canada on October 17, 2020, and presented his credentials to Governor General Julie Payette on November 30 in a virtual ceremony due to the COVID-19 pandemic.