I think about of posters have TX as a toss up in the future due to increased minority (Latino) voters. Also more people are moving there from all parts of the country. It will take a few more elections for it to start showing .. 2024? But 20 years is almost like a generation.
But honestly all of this is hard to predict because events and other factors wars, recessions etc.. an make one party rise and the other fall. The Bush 2000's really set the Republicans back for awhile.
It is important ton note that A. Latino population growth is declining. B. Latino turnout is dismal C. Texas latinos are FAR more conservative than the national average.
The underlined quote is true, but Texas Latinos are still a Democratic constituency. In addition, the National Republican Party has worked overtime to offend Latinos to the point where the 40% of the Latino vote George W. Bush once received in Texas will be hard to approach.
Rick Perry got over >40% of the Latino vote there in all of his gubernatorial elections, IIRC. If, say, Villalba was nominated against a white or black Democrat, he'd easily make their vote a toss-up.