Similarly, Turning Point USA, which Kirk founded in 2012, started as a pro-free market organization downstream of the late-2000s Tea Party movement against “big government”, but by the time of his death he had leaned into ideas associated with the Christian right. The organization may have done so because it spotted an opportunity.
...
Kirk had been an evangelical Christian since childhood but earlier in his career expressed reluctance at politicizing his religious views. That changed during the peak of the early pandemic, when Kirk made the acquaintance of several charismatic megachurch pastors protesting church lockdowns. He began to traffic in ideas influenced by the NAR, including the seven-mountain mandate. Turning Point USA also began to forge partnerships with churches.

Kirk’s own evolution was striking: he went from saying, in 2018, that it was important that Christians respect the separation of church and state to denying that any such separation existed in the US constitution.

Kirk never used the exact phrase “seven-mountain mandate”, Boedy said, but at a Conservative Political Action Conference (CPAC) in 2020 Kirk praised Trump by saying: “Finally, we have a president who understands the seven mountains of cultural influence,” which was one of the most prominent mentions of the concept in the conservative mainstream. Kirk also attended conferences organized around the theme of the seven-mountain mandate.

https://www.theguardian.com/us-news/2025/sep/20/charlie-kirk-martyr-christian-nationalist-movement