Nope it is on going movement;
http://www.texasnationalist.com/
If it ever comes to fruition it won't be just Texas other States will join the party.
Looks like Louisiana has started a movement as well;
https://petitions.whitehouse.gov/pe...ca-and-create-its-own-new-government/1wrvtngl
Peacefully grant the State of Louisiana to withdraw from the United States of America and create its own NEW government.