"She felt that the governor had promised not to run for reelection this year, or at least led her to believe that, so my sense is that she's not likely to want to step aside and let him make an appointment."
Stein believes there may still be some lingering hard feelings. But at her press conference in San Antonio, the senator said it was all about doing what's best for the country and the people of Texas.
"My experience will be better used fighting this effort of the President and Congress to do so much that is really taking away the essence of America, in my opinion. So for the long term for my children I think it is better that I stay and serve out my term."
Regardless of her feelings towards Perry, Stein says there are other factors that probably influenced her decision.
"I am certain that she's somewhat pressured by the Republican leadership not to leave the seat open even to the possibility of an appointment or special election which would have to be held. Second, I think she's not excited about having her successor appointed by a candidate who she was beaten by and who by I suspect she still does not have fond feelings."
And last but not least, there's that desire that all winners have — whether it's athletes, movie stars or politicians — the desire to go out on top. Stein believes Senator Hutchison may want a say in the future of NASA as well as immigration legislation.