The article is correct. This kind of canvassing, volunteering is all the more important in the non-red, purple state of Texas.
Even though the two biggest cities and some of the border areas are blue, Texas is still very red. Texas is a big state and the larger cities, Austin, and some small border towns are still greatly outnumbered by the rest of us. If we can keep the commies from coming here from California we can stay red.