As there is not much information about Beto O'Rourke's short stories, we can't accurately define the themes. However, considering his background and interests, themes like democracy, the rights of the people, and the importance of youth participation might be possible if he has indeed written short stories.
One of the top stories could be his political campaigns. For example, his run for Senate in Texas which got a lot of national attention. His progressive stances on issues like healthcare and immigration were widely discussed.
Since I don't know the exact short story, it could be about his political journey, so the main theme might be perseverance in the face of political challenges.
Beto O'Rourke is mainly recognized in the political arena. While it's possible he has dabbled in short - story writing, there's no common knowledge of a significant body of short - story work by him. You might want to start your search by looking into any writings he may have done during his earlier years or in local community settings, but it's likely to be a challenging search given the lack of mainstream awareness of such works.
There could be a fan fiction where beto o rourke discovers a long - lost family secret while on the campaign trail. This secret could add a new dimension to his character, and the story could follow how he balances this new knowledge with his public life and political aspirations.
I think he didn't write it. Maybe it was misattributed to him. Sometimes stories get wrongly associated with public figures. Without proper evidence of his writing, like drafts in his handwriting or statements from him about writing it, it's hard to believe he's the author.
I'm not aware of Beto O'Rourke writing a fantasy killing story. There is no information to suggest that he has engaged in writing such a genre of story.