I'm not saying the USA should stop being a democracy, or even being capitalist, like China didn't change its system of government in 1990. What I'm saying is its fundamental beliefs, goals derived from those beliefs, and systems designed around those goals —even within the same political and economic system that currently exists— could use an update.
Let me put it this way. Everyone has heard of Maoism [1] of course. There's also Dengism, which does claims to not reject Marxism–Leninism or Maoism, but instead adapt them to the times China was going through [2]. Turns out what Mao believed might or might not be true, but it certainly wasn't working. A change in system of government wasn't needed, but a change in philosophy was.
Now Xi'ism [3] has been taking shape, and rightly so. The world, and China's place in it, are very different from where they were two decades ago. It doesn't seem to far-fetched to re-think what the purpose of that government is, what it believes to be true, and to figure out how to shape policy around it.
To give another example closer to the USA, in 2022 Mexican President Obrador held a rally, where outlined the philosophy of his political movement. Inheriting largely from what people had been calling Obradorism, he defined Mexican Humanism, which takes from the general current of mumanism but adapts it to the moral and ethic values, the needs, and other philosophical currents of Mexican politics [4].
It just seems to be there haven't been fundamental "-isms" in the USA in a while. The philosophy is the same. The USA considers its position in the world the same. The game the country is playing, it's purpose in the world, it's goals all seem the same as they did last century. All we get is "Bidenomics" or "Trumponomics", which are not so much philosophies, but just different ways of spending money within the confines of the same set of beliefs— corporatism, neoliberalism, hegemonism in the exterior, political nationalism in the interior.
IMO presidents and candidates here just seem to have so little substance in ideology. Bernie is the most recent one I can think that really talked ideology, and spoke widely about democratic socialism. He wasn't talking about tearing the constitution, just about thinking of different goals within the same framework of government.
I'm not surprised that "identity politics" takes over instead, and people come to worry about where the grandparents of a candidate were born. If candidates give you little philosophy to relate to, I guess you have to assume their philosophy based on their skin color.
[1]: https://en.wikipedia.org/wiki/Maoism
[2]: https://en.wikipedia.org/wiki/Deng_Xiaoping_Theory
[3]: https://en.wikipedia.org/wiki/Xi_Jinping_Thought
[4]: https://puedjs.unam.mx/revista_tlatelolco/el-concepto-de-hum...