The US doesn't want to live in a multipolar world. It wants to remain the hegemonic global superpower, basically to make a handful of really wealthy people even more wealthy at the expensive of everyone else.
So do I believe the US wants to treat China like an enemy that "needs" to be degraded? Absolutely. Do I think it should be that way or has to be that way? Absolutely not. But that is a minority position in US political circles. One thing the Republicans and Democrats are united on is the US imperialist project.
You have a handful of candidates like Graham Platner who think the path forward with China is one of cooperation not competition [1]. The Democratic Party, just like the Republican Party, hates this kind of rhetoric. That's what we're dealing with.
Part of selling that is convincing everyone is that China is or wants to do the exact same imperialism that the US is doing. What's China actually doing? The Belt and Road Initiative [2] where China basically sues its massive trade surplus to go around the world and build ports, airports and roads and to fund mines, farms, power plants and oil and gas. All on significantly better terms than the World Bank and IMF offer [3], so much so that Africa is considered "lost" to US interests in favor of China.
Fun fact: the United States Africa Command is headquartered in Germany [4]. Why? Because no African country wants it. It's one region where the US only has a handful of bases (eg Djibouti, Kenya).
When the country that produces most of the world's weapons is telling you that there's some big military threat that can only be solved by selling more weapons I just ask: consider the source.
[1]: https://x.com/PollTracker2024/status/2028936316285546537
[2]: https://en.wikipedia.org/wiki/Belt_and_Road_Initiative
[3]: https://www.cgdev.org/publication/chinese-and-world-bank-len...
[4]: https://en.wikipedia.org/wiki/United_States_Africa_Command