Border communities with Canada

[Kuumo]

Keep in mind that a lot of the communities on the Mexican border are populated with descendants of Mexicans who often still have relatives in Mexico while the vast majority of Americans living near the Canadian border are not descended from Canadian immigrants. A lot of the Republican swing in the Rio Grande Valley came from people who identify much more with generic Texan culture than with Mexican culture. People whose families have lived in the U.S. for generations are unlikely to think like or care much about people in foreign countries, even if one of those countries is right on their doorstep.