Do you really think the overwhelming majority of Hispanics in Brownsville and other border towns in Texas are documented citizens?
Absolutely.
I'd float a WAG of
at least 80%. And most of the actual Mexicans on the street in daylight will be crossing back and forth legally.
Bear in mind that from Brownville to El Paso we're talking a legit Border population of about 2 million souls. Now, how many of these Americans LOOK like Mexicans in a whole 'nother story.
Birdwatcher