A member of the Socialist Party, his candidacy was supported by the New Ecologic and Social People's Union (NUPES) coalition.
In 2022, he ran to succeed Hélène Vainqueur-Christophe as member of Guadeloupe's 4th constituency in the National Assembly.
Califer advanced to the second round of the contest, where he faced Marie-Luce Penchard of the Ensemble Citoyens coalition.
However, Penchard dropped out during the second round, allowing Califer to automatically win the election.
[3][4] In 2023, Califer publicly endorsed the re-election of the Socialist Party's chairman Olivier Faure.