The 2016 presidential campaign of Manuel "Mar" Roxas II, former Senator of the Philippines and former Secretary of the Interior and Local Government was announced on July 31, 2015.

[5] However, on September 1, 2009, at the historic Club Filipino, Roxas delivered a speech at a press conference announcing his decision to withdraw from the race and support the candidacy of Aquino for the presidency.

He was defeated by Makati Mayor Jejomar Binay of the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP–Laban), a guest running mate for then-defeated Pwersa ng Masang Pilipino (PMP) presidential bet Joseph Estrada, a deposed president who convicted a massive corruption in the previous year by the narrowest margin in the history of the Fifth Republic.

[8] Roxas also requested the Presidential Electoral Tribunal to order an independent forensic examination of the 26,000 compact flash cards and the source code of the PCOS machines used in the 2010 elections.

[10] On August 31, 2012, President Aquino appointed him as Secretary of the Interior and Local Government, replacing Jesse Robredo, who had died in a plane crash on the shores of Masbate Island thirteen days earlier.

[18] Roxas' often dismal showing in opinion polls emboldened some members of the Liberal Party to call on Aquino to endorse Poe as his preferred candidate instead.

Aquino expressed his wish in having a "united ticket" and that the broad coalition that had helped elect him in 2010 would remain intact, although according to Poe, there were "no specific commitments or positions mentioned.

To the raucous cheers and applause of members of Congress, the widescreens inside the Batasang Pambansa showed a live shot of Binay, Poe and Roxas together as Aquino discussed the 2016 election.

In a speech during which he formally endorsed Roxas as his preferred successor, Aquino laid out his reasons for supporting him, citing his "integrity" and commitment to "real change."

In his resignation letter to President Aquino, he once again thanked him for his endorsement and vowed to "begin the process of turning over in an orderly manner all the matters pending in my office.

"[30] During his final flag ceremony at Camp Crame, Roxas bade goodbye to his colleagues and thanked the members of the Philippine National Police.

[37] In his presidential campaign, Mar Roxas vows to relentlessly continue the “Daang Matuwid” (Straight Path) and sustain the policies that have been implemented by the administration of President Benigno Aquino III,[38] whose term will end in 2016.

According to Edwin Lacierda, who serves as the presidential spokesman of President Aquino, the current administration claims that these policies have contributed a lot to the development of the country.

[39] Roxas further commits to expand and refine these existing policies, if needed, in order to make an economic, social, and political impact, which are significant, to the growth of the Philippines in the next six years.

For the rural community, there is already the Bottom-up Budgeting Program[41] which seeks to provide necessities and other essential things needed by the locality in order to have a sustainable life.

For instance, in relation to fiscal policy or government expenditure in particular, Roxas assures in his interview that part of his plans in 2016 is the strengthening of public–private partnership projects in order to increase the flow of foreign direct investment, which in turn can reduce the external debt of the Philippines.

Specifically, he wants to develop a good blueprint for physical interconnectivity projects, like airports, seaports, other ports, and national infrastructures as these will play an important role in Philippine business.

[45] For the social and political side, Roxas' platforms are the following:[46] On October 12, 2015, the party announced its complete senatorial line-up at the LP National Headquarters in Quezon City, just before their filing of COCs.