According to the linked article:
Texas demographics today are strikingly similar to those of California in 1990, before Democrats began their seven to nothing streak of Golden State victories in presidential races. Like California in 1990, the Texas population currently hovers around 29 million and is changing rapidly in light of heavy immigration from Mexico. The second generation children of Mexican immigrants have played a major role in keeping California out of Republican reach. This same transformation is taking root in Texas.
The article is not talking about the children of legal immigrants. Rather, the voters “transforming” Texas are the children of illegals, who are United States citizens because of “birthright citizenship,” a misinterpretation of language in the 14th Amendment (“All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside”) intended to give citizenship to the newly freed slaves.
Immigration has already had a very tangible impact on Texas politics. While illegal immigrants cannot vote, their children born in the United States are indeed citizens and make up a significant share of the new generation of voters in the southern state.
The order of magnitude is huge:
Based on the anecdotal evidence from the article, these children of illegal-aliens are overwhelmingly voting for “free stuff.”
Young Texas voters overwhelmingly turned out for Beto O’Rourke over incumbent Ted Cruz in the Senate race last year. O’Rourke beat Cruz with 18 year olds to 24 year olds by a margin of 68 percent to 32 percent and with 25 year olds to 29 year olds by a margin of 73 percent to 26 percent.
These numbers are far, far worse than President Trump fared versus Hillary:
Hillary Clinton won the youth vote (55 percent) while Donald Trump only garnered the support of 37 percent of the millennial electorate. Comparatively, in 2012, young adults voted for Barack Obama over Mitt Romney by 60 percent to 37 percent.
THIS is why the Democrats are so obsessed with preventing Trump from securing the Southern border. They see illegal immigration as their ticket to permanent political power.