Ik a lot of people are going to talk about "the suburbs" as a generic term in this race, however, I think there's several unique categories of suburbs that each have their own dyanmics.
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When people talk about the suburbs shifting left, they are referring to the outer suburbs. Like Katy, Sugar Land, Tomball, The Woodlands, Pearland, etc. The middle class suburbs have lots of room to grow. Counties like Fort Bend, Collin, Williamson, etc. Very similar to Cobb and Gwinnett in Georgia.
Random fluff comment, but it's a bit jarring for me to think of the Houston suburbs Kevjumba, keshi, and Megan Thee Stallion grew up in (Sugar Land and Pearland) as "outer" suburbs". Probably because that usage is reminiscent of "exurb", which has certain demographic and electoral connotations ("WWC", "Trumpy", "posturbia", etc) that don't describe those suburbs well. For Metro Houston specifically this sounds like the Houston proper neighborhood of Alief being described as an "inner suburb".
As for the actual race, I tend to agree with Spectator on Cruz's chances, even if it might be wishcasting on my part as a partisan Dem.