Hello and thank you for entrusting me to assist you. My name is ***** ***** I will do everything I can to answer your question.
Unfortunately, the general rule is that employment in the state of TX is "at will" absent an express agreement to the contrary. At will employment can be terminated for any reason not amounting to discrimination on the basis of a legally protected trait (race, religion, gender, etc.) or retaliation for engaging in certain forms of legally protected conduct (filing a wage claim, taking FMLA leave, etc.). It doesn't matter whether the basis for termination is fair, reasonable or even true.
This means an employee can be let go for the reasons you describe. It does not matter that you had no history of performance issues, or that the termination was purely political. Who you are related to is not a legally protected trait, and the retaliation you describe is not retaliation for engaging in a legally protected activity.
Don't get me wrong, I completely understand why you are upset and agree that your termination was highly unfair. It just doesn't violate any laws, and all I can do is explain that to you. You should not have any trouble getting approved for unemployment benefits as you search for new work.
I hope that you find this information helpful and am genuinely sorry if it is not what you were hoping to hear. Please do not hesitate to let me know if you have any questions or concerns regarding the above and I will be more than happy to assist you further.
If you do not require any further assistance, please be so kind as to provide a positive rating of my service so that I may receive credit for assisting you. Very best wishes moving forward.