One would have to be the King of Fools to believe Ukraine could in any way defeat Russia,
If they were alone, that would be more meaningful. I'm reminded of the start of the invasion, though, with the widespread expectations that Ukraine would fall quickly to Russia's overwhelming might and the world's largest insurgency would begin.
That never happened, because Ukraine didn't break and successfully defeated Russia on multiple fronts even before more notable aid arrived from the US and Europe. For that matter, even if Ukraine were to crumble tomorrow and Russia take official control of that land, Russia would still have lost to Ukraine in a bunch of ways.
Surrender monkey.
a nuclear power with Putin's finger on the button.
Which Putin would be an idiot to use. Putin has many problems, but I don't normally consider him an idiot. Do you?
The Russia/Ukraine conflict will either end with negotiation
Ending with negotiation would be nice and all. Russia is the main obstacle there, though. Russia's focus with "negotiations" is to further their goal of conquering/controlling Ukraine. Ukraine's focus is actual peace and freedom from Russia's yoke.
or continue with US Troops on the ground, then end in Russian victory after several years of US losses.

And your basis for this is? Russia's brought the full force of its military that it can to bear against Ukraine. Ukraine's caused massive damage to it with its stout defense.
US Troops on the ground is a supposition about as meaningful as it has been since the beginning. There's not much good reason to believe that it'll happen absent Russia directly provoking such (which Russia absolutely doesn't want to do), but it is possible.
The more the US gets involved the likelihood increases that Russia will bring the war closer to US soil. No thanks.
The less the US gets involved, the more likely that Russia would be emboldened to do that anyways. Being a surrender monkey in front of those who would prefer to effectively enslave you is an invitation for them to take action, after all.
Fear sells and the Democrat Party is great at furthering their agenda by selling fear to promote it.
Interestingly enough, there's something very, very important to note here. It's true that both the Republican and Democratic Parties sell fear. There's a very profound difference, though, after that superficial similarity. The Democratic Party sells fear that's well founded in reality and tends to try to take action to actually solve the things that are causing the fear. The Republican Party often manufactures unreasonable fears with little basis in reality and acts to make it worse while only pretending to address such. This has become ever more common in recent years as more and more of the Republican Party have been ignoring the responsibility of governance in favor of pushing manufactured culture wars.
The fact is the USSR was a heavy hitting Communist Regime back in the day, but they were defeated by Republican policy decades ago.
Not the policies of today's Republican Party, though, of course.
Russia is no longer the USSR and no longer a credible threat to Europe. In fact 3 of the 50 US states have a larger GDP than Russia. (Look it up)
Yet, you would still contend that an incredibly weakened Russia would defeat the US in a battle for a relatively small area? It'd be entirely plausible for the US to lose if they sought to conquer Russia as whole by force. Pushing an already greatly crippled Russia back to the official borderlines while being aided by the locals, though, is a very different story, and one that would be quite doable for the US. Supposing that a fresh US would fail to accomplish a distinctly limited objective with significant help from the locals against a severely weakened and exhausted Russia, despite the US having major military advantages is a testament to how highly you seem to regard Russia's military capabilities and how low your view of the US is.
So, Political posturing and warmongering are on the ballot. Can Biden end these wars with negotiation? Has he tried? How many calls or visits has he made to speak with Putin? Any? Is the word "Don't" a viable foreign policy?
For negotiations to work, there needs to be room for negotiations. For smaller things like PoW exchanges, there is room for negotiations. On the larger scale? As noted earlier in the post - Russia's focus with "negotiations" is to further their goal of conquering/controlling Ukraine. Ukraine's focus is actual peace and freedom from Russia's yoke. So long as Russia makes it perfectly clear that they have no intention of negotiating for actual peace, as they continue to do, the only viable option for the people who actually desire peace is to work to strengthen Ukraine's negotiating positions and weaken Russia's negotiating position. Unfortunately, that involves military force, because Russia's using military force as their primary negotiating tool.
So far, what you've advocated for is NOT peace. It's unnecessary surrender to oppression, exploitation, and genocide. It's rewarding bad behavior in ways that make that bad behavior more likely.
If we're going to share opinions, I believe you fear that Trump will end these conflicts without furthering war.

Talk about a grain of truth wrapped in BS.
In a rather twisted way, you're correct. I do fear that Trump will seek to end
this particular one in problematic ways that just happen to not further this part of this war. If it were just that, it'd be a good thing, though. I have no love of war, after all. Rather, it's the aftermath that I fear. Trump's ways of seeking to end this war do far more to encourage more and worse wars and injustices, including when it comes to Russia attacking Ukraine again, than continuing to give the Ukrainians the tools they need to defend themselves against tyranny will ever do.
Trump will further demonstrate the Democrat endless wars philosophy is needlessly destroying the World
The selective blindness required to say "Democrat endless wars philosophy" would need to be rather debilitating. At this point, broadly speaking, Republicans have long been the party pushing the use of our military and might to gain national advantages, even when such is unprincipled. Democrats have long desired that our military usage be more restrained and used to uphold American interests only when it can be done while being in line with the higher principles to which we as a country aspire.
With that said, it's perhaps worth noting that the US has officially been at war with one or more nations for something like 230 out of its less than 250 years of its existence. What issues there are there have far less to do with any particular political party than war's nature as a tool to seek to gain various advantages, the willingness of many to use it, and the necessity to defend by those it's used against. War is horrible. That doesn't mean that fighting in a war is inherently wrong.
needlessly killing hundreds of thousands, if not millions of people.

Ya know, when you keep siding with the side of the conflict that repeatedly and openly calls for mass genocide of innocents and has spent a remarkable amount of military force specifically to harass and murder innocents, your "concern" seems like it's only actually with the deaths of the invading Russians.
Russia still has nuclear weapons. More importantly Russia has Putin in charge of those weapons. If the Kremlin was in danger of being captured by Ukranian forces would Putin launch? What do you think? I think he would.
That's quite the interesting hypothetical, not least because of how much it resembles DARVO.
Russia is the one invading Ukraine. Ukraine is fighting to uphold their official borders. Further, so very much military support for Ukraine is conditional on the premise that the support will NOT be used to invade Russia.
Why does the Media kill any story related to the Ukrainian Nazi problem?
Your premise is false. Stories about Ukrainian Nazis aren't killed. They're just not particularly catchy or interesting. They're also greeted with eye rolls because of the larger situation. For American citizens, the US' and Russia's issues with fascists are far more of note right now, quite frankly. The US' problems are obviously of more immediate interest and when the political party with a nasty fascist problem close ranks rather than address the issue, their "concern" quite seems to have little to do with actually opposing fascism. With Russia, of course, it's just been brazen hypocrisy and BS all along, as they celebrate and reward actual Nazis for committing atrocities. Going along with their pretenses and lies like they aren't transparent isn't some praiseworthy thing.
Granted it may not be as much of a big deal as Putin portrays it to be, but it is a thing and one should NOT ignore it.
Just because a problem exists, period, doesn't mean that it deserves the attention that certain parties that are motivated to smear others would give it. Ukraine's problems with fascists, like every country's problems with fascists, do deserve attention and addressing. It's pretty friggin' low on the priority list there, though, compared to everything else... especially when, in actual usage, "Nazi" is largely being conflated with "anti-Russia," given the actual circumstances in play. Someone's strongly against Russia as Russia invades their country and seeks to commit genocide against their people? They're a Nazi, by the standards used by certain groups that seek to harm Ukraine.
A separate thought, though, in a slightly different direction. Think for a while on about how much you'd like to live in the world envisioned and fought for by the (actual) far left and the far right.
As a general rule, the far left has a bunch of serious practical issues that would need to be overcome to make the world they envision into reality. The world that they envision is a beautiful one, though, with decency, respect, and needs fulfilled for all.
As a general rule, the far right doesn't have much in the way of practical issues to overcome. The world that they fight for is pretty inevitably a truly horrible one for an overwhelming share of the population, though.