If you are talking about reducing the defense budget to fund programs and infrastructure at home, I couldn't agree more. We currently spend an astronomical amount on defense spending, and yet are still unprepared for modern warfare (which is increasingly taking place in the virtual realm).
https://i.imgur.com/WuLX1jf.jpg
For some reason, neither side of the aisle wants to do that though. The Democrats pay lip service to it from time to time, but for the most part they don't actually put it in the budget. Don't think for a second thought that mainstream Republicans wouldn't absolutely excoriate Democrats if they significantly cut defense spending though.
I'm all for the United States maintaining the most powerful Military in the world. I just think we can probably do it for less than 3X what China spends. Lot of Defense Industry money flowing into political coffers though...