Q: Doesn’t the Texas Constitution reserve the right of Texas to secede?
A: No such provision is found in the current Texas Constitution[1](adopted in 1876) or the terms of annexation.[2] However, it does state (in Article 1, Section 1) that “Texas is a free and independent State, subject only to the Constitution of the United States...” (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 rest of the United States...”)

Likewise, each of the united States is “united” with the others explicitly on the principle that “governments derive their just powers from the consent of the governed” and “whenever any form of government becomes destructive to these ends [i.e., protecting life, liberty, and property], it is the right of the people to alter or to abolish it, and to institute new government” and “when a long train of abuses and usurpations...evinces a design to reduce them under absolute despotism, it is their right, it is their duty, to throw off such government, and to provide new guards for their future security.”