Judge O'Conner was appointed by George W. Bush to a vacancy in the District Court for the Northern District of Texas. He was assigned to the most remote federal courthouse in the District: Wichita Falls, TX. This federal court branch is so small that O'Conner is the only judge regularly assigned there.
This case was maneuvered into Judge O'Conner's court by ultra-right-wing Texas Attorney General Ken Paxton, who got an earlier case assigned there by filing a bathroom challenge on behalf of a tiny rural school district near Wichita Falls.
Here's an article showing the mechanics of how this worked:
http://www.law.com/sites/almstaff/2016/08/24/why-conservative-states-handpicked-this-texas-judge-for-transgender-bathroom-challenge/?slreturn=20170002165907Why Conservative States Handpicked This Texas Judge for Transgender Bathroom ChallengeBY JOHN COUNCIL
LAW.com, AUG 24, 2016
"Soon after he was seated as a federal judge, O'Connor was handed the least favorite duty among Northern District of Texas jurists—handling the docket for the Wichita Falls Division. That assignment requires a Northern District judge to make a monthly four-hour round trip drive to a wind-blown courthouse where the docket mainly consists of prisoner civil rights suits filed by inmates of nearby North Texas penitentiaries.
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"Texas Attorney General Ken Paxton, who has made a career out of attempting to block Obama administration initiatives and fighting against the rights of LGBT people, likely calculated that he'd have a sympathetic judge when he filed the transgender bathroom initiative challenge in front of O'Connor along with several other states this year.
"That's because in 2015, O'Connor granted Paxton's request not to extend family and medical leave benefits to same-sex couples. . . .
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"Then Paxton sought out O'Connor's court again to fight the Obama administration's transgender bathroom initiative by filing the challenge on behalf of a small school district located near Wichita Falls."
Basically, Judge O'Conner is now the right wing's "go-to" federal judge for attacks on LGBT rights. Putting cases involving LGBT rights in his courtroom not only places them before an ultra-conservative judge, but also makes sure that the rights of LGBT people throughout the country will be analyzed and determined according to community standards prevailing in Wichita Falls, TX, one of the most conservative and backwards counties in America.
It's going to be a LONG four years.