Don't underestimate the "closet Democrats" effect in North Dallas. For decades they had no one to vote for up, so they do not really register accurately in DPI v. RPI performance ratings. Not that Frost will win N. Dallas, but I think he will do better there than people will think. Also remember, voting rates among Jews is VERY HIGH. Probably 90% of the Jewish population (many if not most who vote Republican) lives in the 32nd and they are going to bat for Martin.