MANILA—President Rodrigo Duterte should give Vice President Leni Robredo 3 years instead of 6 months to enforce the law in the country, a senator said Monday.

"Bakit naman 6 months lang? Gawin na nilang 3 years," Sen. Francis "Kiko" Pangilinan wrote on his Facebook page.

(Why only 6 months? Make it 3 years.)

With Robredo at the helm of law enforcement, the Vice President will ensure there is no slipping of illegal drugs in the Bureau of Customs (BOC), he said.

Robredo will also put an end to the daily killings of poor Filipinos, Pangilinan added.

• 'Subukan mo': Duterte says to give Robredo law enforcement powers for 6 months

The Duterte administration, the senator also alleged, had given rogue police officers involved in the selling of seized narcotics higher position in the government and let criminals walked free due to the good conduct time allowance (GCTA) law.

Pangilinan said Robredo would not also allow the Philippines to become subservient to China.

"3 years na nilang hawak ang law enforcement so dapat lang 3 years din ang ibigay na oras para fair!" he added.

(They've been enforcing the law for 3 years so they should give [Robredo] 3 years so it is fair.)

In his speech in Malacañang on Monday, the President said he would put Robredo in charge of law enforcement for 6 months.

He later clarified he wanted to designate the Vice President as the country’s anti-drug czar in solving the country's illegal narcotics problem.

• Robredo pushes for health-based approach to stop drug addiction

Duterte's remark came after Robredo called for an reevaluation of the President's campaign against the illegal drug trade.

She said the government should consider a health-based approach, noting that the number of drug dependents was rising.