Because back in the 90's - when dimocrats still controlled the Texas legislature - they drew up the boundaries for the 18th Congressional district that would effectively guarantee that the seat would be forever held by a Queen Sheila or her equivalent. i.e. a big-government, free-lunch, anti-freedom Marxist. Go look at a map of TX-18 to see gerrymandering in action. It is perverse.
Sadly, I got taken hostage in the process and still dwell on the far NW edge of the Queen's realm. It ain't pretty.