A couple of points along the border, Austin and San Antonio and inner cities, is where the dems have some standing other than that Texas is pretty red!!
Sadly too many parts of Houston, El Paso and Dallas as well. Typical leaning of bigger cities.
http://www.politico.com/2014-election/results/map/house/texas/#.VGZWW_nF98E
“Austin and San Antonio and inner cities”
Except for the ‘burbs too expensive for any but the rich, people in the SA burbs don’t vote democrat.
I decided a while back that building moats around any major city that is primarily blue and turning them into isolated islands populated by pariahs would be an excellent idea...