They know and that's why they bought the race track in Grand Prairie because the skinny is if they do weaken, it will begin with video gaming allowed at the race track. Nothing to say they couldn't be the licensee in N TX.
The Chickasaw's have put a ton of money into Winstar with the hotels and expansion and if Texas did legalize it and they were left out, that would be a ghost town compared to what it is now. And it's questionable whether they could bring in the big acts without the N TX traffic.
I don't think they believe it will happen anytime soon as the media has been doing pieces on lost tax revenue since the casinos opened. They seem to conveniently ignore it in Austin because they don't want to anger some people in Texas and it's just an assumption on my part but I think church people are more likely to vote than gamblers. And I have never seen any research on what Texans want and if they really care. Some of the states that have legalized it were losing pop and needing tax revenue, Texas is just the opposite so I don't think it even gets brought up for discussion.
Between the two, I'd rather see them legalize pot more than gambling because then I could get lost on the way to the casinos.