Such is the case with the East-LA Chicano group, Las Cafeteras. Their version of the traditional (and Richie Valens/Los Lobos covered) song "La Bamba" repurposes the lyrics to talk about crossing borders, and was the theme song for a popular Telemundo soap opera.
Their storyshows their links both to traditional music and to lo cal grassroots activism.
Another young LA Chicano band, La Santa Cecilia.
There are similar trends on the East coast.Young Puerto Ricans are now doing bomba:
Not only are these groups doing traditional music, they're engaging in different kinds of fusion between different folkloric genres, and with popular music, as with El Barrio stalwarts Yerbabuena.
Another New York-based group, Kalunga has directly confornted some of the exclusions in traditional music. Against the politically loaded division between the Dominican and Haitian nations, Kalunga, consisting of both Dominican and Haitian New Yorkers, performs both Afro-Dominican and Afro-Haitian music, arguing for the unity around a shared frame of blackness.
Traditional group La Cumbiamba Eneyé: