SANTA CRUZ, Bolivia—Chile’s foreign minister Andres Allamand stepped down from office on Feb. 6,  amid accusations of abandoning his post as a migration crisis continues unfolding at the nation’s northern border. Allamand hosted a meeting in Madrid on Feb. 3 as the Ibero-American secretary general, which was a red flag for Chilean officials. Back in South America the country’s interior minister Rodrigo Delgado traveled to the remote Tarapaca desert region—where the migration problem is occurring—to address the need for increased security. Undersecretary of foreign relations, Carolina Valdivia, will replace Allamand during the transitional periods between the administrations of outgoing President Sebastian Pinera and president elect Gabriel Boric. Chamber of deputies member Jaime Naranjo called Allamand’s move a “remarkable abandonment of duties” and didn’t rule out the possibility of a constitutional accusation against the minister. “He [Allamand] should’ve resigned as soon as he assumed an international office in Madrid, and not …