I found this through a Bud Kennedy tweet.
You can check out the whole article and other maps here, but this one stood out.
Southern Baptists are in red and dominate North Texas. I guess they’re red because all of them are Republicans (I’m kidding). One of the blue counties in North Texas is Dallas County, which means a lot of Catholics, but I don’t think they are all Democrats, but maybe they are.
Based on your comments I thought I was reading Barrys Blog, had to go double check.