The former GOP candidate has frequently made her "anyone but Christian" position clear on social media, making this endorsement little surprise.
In the end, the last-minute $2 million television buy was not enough to make Stogner competitive on election night.
During her race, Stogner has been accused of holding beliefs antithetical to her party's while taking aim at the oil and gas establishment.
The two challengers, one Republican and one Democrat, hope to unseat incumbent Wayne Christian who is seeking his second term.
The withdrawal brings an end to the years-long effort to construct an oil and gas disposal site in East Texas.
Stogner narrowly edged out Tom Slocum for the second runoff position by less than a percent.
