Not sure this makes sense. I think the window shifts right as people continue to vote right.

From the Wikipedia article about the Overton window:

The most common misconception is that lawmakers themselves are in the business of shifting the Overton window. That is absolutely false. Lawmakers are actually in the business of detecting where the window is, and then moving to be in accordance with it.

Agreed. A lot of money has been spent on crafting agenda and shaping public and party opinions. Although malicious, Project 2025 seems carefully considered. I assume the wealthy investors bankrolling the project have considered Trump’s mortality as well.