[Slyfox]

If they wrote up the wrong bill then they would have no standing. I would be willing to bet it is being rewritten as we speak.

[Dr. Franklin]

Article III, Sec. 2, Clause 2:
In all cases affecting ambassadors, other public ministers and consuls, and those in which a state shall be party, the Supreme Court shall have original jurisdiction.

POTUS is a "consul" in its original meaning from the Roman Republic:
https://en.wikipedia.org/wiki/Roman_consul#Under_the_Republic
Since the case affected the election of POTUS, it was within SCOTUS's obligatory original jurisdiction. Unfortunately, Texas didn't brief this point.