imo ...

If Pres Trump wants the war to end, the solution is simple --- make Pres Putin want to stop the war.

How might Pres Trump do that?

Well for starters, Pres Trump should stop giving Pres Putin concessions that he wants and Pres Trump should stop making it look like US support for Ukraine's defense is wavering.

Pres Putin is only going to stop the invasion of a sovereign Ukraine when it is to his benefit to stop, not before.

@#4 ... Putin has the Epstine tapes, so Dotard has to toe the line ...

Pres Putin certainly seems to have something over Pres Trump. I've not a clue what that "something" might be.

Perhaps it is something as simple as Pres Trump naivety towards Pres Putin?

Whatever it is, Pres Putin seems to be using it well to exploit Pres Trump for Pres Putin's desires.

@#10 ... Anything short of complete withdrawal of Russian troops would be placating Putin and approving of the Russian invasion of a nearby nation. This would smack of the way the west placated Hitler and 18 months later Hitler was in Paris.
And 7 years after placating Hitler, 400,000 American soldiers were dead and 80 million people were dead worldwide.

Yup.

Pres Putin has stated that Ukraine should not exist, and that it is really part of Russia.

That may be why he refuses to negotiate with Pres Zelenskyy.

Stated differently, how can Pres Putin, as a Head of State, possibly negotiate with a President of a Country that Pres Putin states does not exist?

I will state it again, Ukraine's battle against Pres Putin's unprovoked invasion of a sovereign country will not end until Pres Putin realizes he lost.

And Pres Trump does not seem to want to move Pres Putin's opinion in that direction.

Quite the contrary.