As Peggy mentioned before, the maps that accompany the county’s elections results provide some interesting data.
I’ve been looking at the map that accompanied the straight-party votes.
As we know most of the county is red (Republican) but a few precincts in Denton, Lewisville and Carrollton have seen more straight-ticket Democrats.
This is just early voting results, but take a look
http://results.enr.clarityelections.com/TX/Denton/43961/106649/en/md.html?cid=110