I'd wouldn't want to call our top down controlled political formations in the USA "Parties."
But for brevity's sake, I'll use the convention.
Looking only at the imperial posturing of each Party, the Democratic Party fosters war with Russia most, and the Republican Party fosters war with China most.
But mainstream parts of each Party will essentially tell the same story about the two most powerful geopolitical competitors with the USA. They're the face of evil, brutal, endless tyranny and war crimes, etc. Which in most cases wouldn't be a bad description of the USA and even moreso for some countries it supports, notably Israel. But you can pretty much count on claims made about both Russia and China in the political center of the USA to be unfounded propaganda.
Only at the fringes, the ultra right and the ultra left, is some clarity allowed, for the other side. So, on the ultra right, there is mass acceptance of Russia, and likewise for China on the ultra left.
It is more on these fringes that the truth is to be found, the mainstream being the standard pro-US propaganda.
So as general rule, I defer all claims of atrocities, war crimes, etc, by the Russians and Chinese, at least until I've had a chance to do my investigation of such. Those I've done so var have always shown the US version to be propaganda.* In some cases, on left and right, there nevertheless will be some individuals and groups consistently opposing US imperialism. There's a difference here worthy of note.
There ARE left formations, notably on the fringes, including some socialists and most communist, equally critical of US imperialism in all contests.
On the "left" (of some imaginary center which is more like center-right) this is seen as reducing the Democratic party vote, which is intended to absorb all voters on the left, keeping them on the controllable mainstream.
Fine, that aids Capital, the Oligarchs, etc, because it means fewer votes for democrats in the contest of Democrats v Republicans, when the democrats might bend over slightly less for Capital.
On the right, these people have rightwing economic and social values anyway, and will end up voting Republican anyway. And that obviously aids capital in that same contest.
So in the end, the layout of permissable opinion in foreign affairs is intended to be all about aiding Capital, the Oligarchs, etc. As should be expected. Impermissable opinion is shadow banned in various ways. At some point, for example, you won't advance in your academic, government, or business career if you hold the wrong opinions.
This also explains why it's necessary to include some otherwise right leaning blogs and hosts in my reading list. There are precious few who share my domestic political leaning and a good critique of US imperialism (such as ConsortiumNews and some of the authors there, especially Aron Mate). Another of my favorite commentators, Scott Ritter, is somewhat right leaning but keeps that out of his productions (I'd classify him as right leaning centrist, definitely not MAGA). He has the most complete defense of Russia coming from a US commentator, also MoonOfAlabama, a German (from what used to be East Germany), who is also a right leaning centrist. On the left, a multitude of smart people, including Tony Greenstein and his friends in UK. Another of the best is John Helmer, former US journalist now living in Moscow.
*I include such things as claimed genocides in Ukraine (the Holodomor) and in Xinjiang...both of which I believe are fabrications of propaganda. The Nazi Holocaust was real (and don't forget it included Communists and Homosexuals too, and the Communists were first). Stalin's purges were far smaller than commonly claimed, and completely dwarfed by political killing performed or funded by the US. To the point where, it was not surprising that most Russians of the time, later, and even at present still regard Stalin as a hero for directing Russia to become an industrial powerhouse and win the world war, while still providing jobs for all and some kind of simulation of modernity (which is looking comforting nowadays). The mobs didn't rise up and kill Stalin, he was poisoned in a way implicating some insiders possibly having foreign connections.