The politics of U.S. Southern border migration

Abstract

This thesis examines the impact of the post-2020 surge in U.S. Southern Border migration on political attitudes and policy preferences. Using a shift-share instrument and data from the Cooperative Election Study, it identifies a rightward shift among voters, particularly Democrats, toward stricter immigration policies and increased border security. The study also links immigration surges to enhanced approval for Republican politicians and reduced support for Democrats, indicating a broader realignment of political dynamics. The findings highlight the intricate interplay between migration patterns and political shifts, contributing to the literature on immigration and electoral behavior.