If Martin Frost wins a district that is 65% GOP voter registration, its cause he's more a Republican than Sessions! Go figure.
I make house calls to the N Dallas / Preston Hollow area, and there are many Frost yard signs. One of my customers is a lifelong Dallasite and a strong Democrat, much to my surprise. She grew up Democrat in the 50's and 60's and has changed her values to remain a Democrat.
Don't count Frost out. These well off N Dallasites regularly send money to "urban" candidates and are very liberal, or at least RINOs.
A movie on liberal guilt could be filmed up here, after yet another socialite raises funds for the homeless/Mother Earth/poor minority kids. They may have money, but they don't have common sense.