It is true. as the Senator says. that if there were more people in Mexico who could read and write. if there were more of them who were not contract laborers. if there were more of them who were physically and mentally fit to enter the United States. if there were more of them who were not likely to become public charges. they could be admitted. For those various reasons they have been refused admission. and there are not more of that kind In Mexico. The proof of that fact is that thousands of them have been turned away from the consulates. Others have not applied because they knew that If they did apply visas would be refused.
Identified stereotypes
Generalization that people in Mexico are uneducated, likely to become public charges, and/or contract laborers.