For the purpose of educating those who simply don’t know these facts, I’m publishing selections from the Texas state constitution that make it perfectly clear: Texas voluntarily joined the union but did not surrender power to the union. It reserves the eternal right to run its own affairs.
From the Texas Constitution, article 1, section 1:
“Texas is a free and independent State, subject only to the Constitution of the United States…”
As TexasSecede.com points out: Note that it does not state “…subject to the President of the United States…” or “…subject to the Congress of the United States…” or “…subject to the collective will of one or more of the other States…”