The good news for Cruz is that he’s the overwhelming top choice of Texas Republicans to be their Presidential candidate in 2016. He gets 32% to 13% for Jeb Bush and Chris Christie, 10% for Rand Paul, 6% for Bobby Jindal, 5% each for Marco Rubio and Paul Ryan, and 3% each for Rick Santorum and an incredibly weak on the home front Rick Perry. Cruz's 19 point lead over the GOP field is up from 12 in late June.
Although Cruz has abysmal favorability numbers in most of the rest of the country, his net approval rating in Texas is the same as it was in June. 47% of voters approve of him to 41% who disapprove. It was 42/36 last time around so he's better known now but as his profile has risen equal numbers of voters have grown to approve or disapprove of him.