Danielle Kurtzleben

Now, all of this is another shift in Trump's hot and cold feelings towards Putin.

Trump has gone from saying earlier this year he could easily convince Putin to end the war to being pretty frustrated with him.

And now Trump seems to feel more warmly again.

But there was one more thing that really stood out to me.

A reporter asked Trump how long it might be before all of the final disagreements are ironed out.

And Trump said this.

Now, this is Trump talking.

He loves hyperbole.

He loves talking up his own abilities.

The very fact that he's lukewarm on success could signal that there's still some distance to go here.

So tell us more about that.

What are the hangups?

Well, one question is how to deal with the Donbass region in eastern Ukraine, which Russia wants to control.

Zelensky wants it to be a demilitarized zone, and he says that Ukraine will withdraw troops if Russia does.

Trump said that on Donbass, he and Zelensky do not agree, but they're getting closer.

On that note, Ukraine also wants security guarantees.

This morning, Zelensky told Ukrainian press that he asked Trump for a 30- to 50-year guarantee.

Now, Zelensky wants to know that the U.S.

and other allies in Europe will defend Ukraine if Russia attacks again.

A reporter asked Trump how much he and Zelensky agree on all of that, and Trump said they're close, but added that there are what he called very tough issues to still work out.