” (but not the Houston and Austin blue cancer zones)”
No San Antonio and Dallas?
Austin is probably the only truly blue area. SA, Dallas and Houston are blue in the city proper but are completely surrounded by far more conservative burbs.
Speaking for SA the only place you will find pro-Hillary signs and bumper stickers are in town. Once you exit the city limits, especially North, you can still find Hillary signs - but they are the ‘Hillary for Prison 2016’ type.