Trump with a powerful message to Putin: There's no business with us, it's wrong if you think so.

He also gave an idea of how he might approach talks, suggesting that his position on security guarantees for Ukraine may have changed.

The American leader also added that, although the American and Russian delegations for the summit seem focused on economic and business interests, his priority is to reach a war agreement before moving into other issues.

Asked by a journalist for security guarantees for Ukraine, 79-year-old said the US could be included, “along with Europe and other countries”.

But, he added, this will not be in the form of Ukraine's NATO membership, saying there are “specific things that will not happen”.

But, together with Europe, there is the possibility for this”, he added.

As to the possibility of trade agreements that could come out of the summit, Trump said Putin “wants a” piece of American economy and business.

And that's good, I like it, because they want to do business, but we don't do business until the war is resolved”, he said.

Putin thinks the ongoing attacks against Ukraine “give power to”, the American president said, but he told reporters “I think it hurts. ”

I think they're trying to negotiate, in his mind that helps him make a better deal. But it actually hurts... but I'll talk to him about it later,” said Trump.

Trump said territorial exchanges “will be discussed, but must let Ukraine make that decision”.

But, I'm not here to negotiate on behalf of Ukraine, I'm here to lower it (Putin) on the table”, he said.

Trump was also asked about the threat he made earlier this week, that there would be “grave consequences for Putin if he was not interested in peace.

“Economically heavy, yes, will be very serious. I don't do this for my health. I'd like to focus on our country, but I'm doing this to save a lot of lives, yes, very heavy,” said Trump.

Otherwise, the meeting between Trump and Putin is expected to begin about 9: 00 a.m., in our local time, Alaska. /Periscopi/