http://dx.doi.org/10.17176/20211105-132259-0 https://staging.verfassungsblog.de/os2-mexico-wall/ From Opposing the Wall to Becoming it Pedroza, Luicy eng 2021-11-05 electronic resource text/html ddc:342 Mexico Migration Verfassungsblog Verfassungsblog--2366-7044 CC BY-SA 4.0 As much as the comparative study of migration policies has developed recently, it still suffers from a blazing assumption: that states have equal sovereign power to determine their migration policy according to their own interests. The notion of “externalization”, so widely discussed nowadays, reminds us of asymmetries of power. In cases of extreme asymmetry though, as in the relation between Mexico and the United States, the spaces for sovereign decision making on migration policy are extremely thin to nonexistent.