[6] At the University of Auckland Public Policy Club Baby Back Benches debate in 2016, a group of Young New Zealand First members started chanting "Build the Wall" at Menéndez March, who is of Mexican descent.

In this role, he had frequently appeared on television, radio, and quoted in newspapers – once a week on average, by his estimate – stating that the government had been failing the poor, that benefits are too low and housing is too expensive.

[5] Menéndez March has been particularly critical of KiwiBuild, arguing that the scheme should be targeted towards working poor and unemployed families and that the current set up will make homeownership rates fall further by encouraging increased property speculation and gentrification.

[11] For the 2020 New Zealand general election, Menéndez March was placed tenth on the Green party list, and ran for the Maungakiekie electorate.

[21] In April 2023, the Greens confirmed that Menéndez March would be contesting former Prime Minister Jacinda Ardern's Mount Albert electorate during the 2023 New Zealand general election as part of a "two ticks" campaign.

[26] In late January 2025, March was the subject of verbal attacks by New Zealand First MP Shane Jones, who shouted "send the Mexicans home" during a Parliamentary debate.

[28] On 19 February 2025, March was criticised by NZ First MPs Peters and Jones for referring to New Zealand as "Aotearoa" while questioning Immigration Minister Erica Stanford.

Speaker Gerry Brownlee defended March but reminded MPs to refer to New Zealand by both its English and Māori language names.

[32] Before sitting in Parliament, Menéndez March expressed reluctance to swearing the required Oath of Allegiance to the Queen of New Zealand, Elizabeth II.

The New Zealand Jewish Council criticised Menéndez March's post, claiming that the slogan was used by Hamas to promote antisemitism and the ethnic cleansing of Jews.

[36][37] During the 2023 Israel-Hamas war, Menéndez March attended a Palestinian solidarity rally where he joined fellow Green MPs Chlöe Swarbrick, Steve Abel and Darleen Tana in chanting "From the river to the sea, Palestine will be free.