President Trump is hosting NATO Secretary General Mark Rutte at the White House on Monday as the U.S. agrees to sell new and more weapons to Europe and Ukraine.

WASHINGTON (AP) — President Donald Trump has endorsed a plan to have European allies buy billions of dollars worth of U.S. military equipment that can be transferred to Ukraine as Kyiv looks for way to better defend itself against intensified Russian attacks.

Trump on Monday said the United States would ship "billions of dollars' worth" of military equipment to NATO members, paid for by the alliance, to be handed over to Ukrainian forces battling grinding Russian advances. Trump had earlier this month suggested NATO would "100 percent" pay for U.S. weapons, which would be sent to Ukraine.

Trump agrees to sell billions in US arms to NATO countries including Germany, Finland and Denmark and others for quick distribution to Ukraine, following his ultimatum to Putin on peace talks.

President Donald Trump and NATO Secretary General Mark Rutte announced what Rutte called a "really big" deal Monday for the US to send Ukraine weapons through NATO, replenishing the besieged country’s supplies of weapons.

What is known about US President Donald Trump's idea to supply Ukraine with American weapons using NATO funds, and why not all allies support this initiative, is analyzed in an article by RBC-Ukraine.

Trump is expected to make a major announcement about Russia after meeting with Mark Rutte. Sen. Lindsey Graham said it will be "very aggressive."

Sitting in the Oval Office with NATO Secretary-General Mark Rutte, and apparently fed up with being slow-walked by Russian President Vladimir Putin, Trump threatened the Kremlin with tough tariffs if it doesn't make a deal to end the war within 50 days. But perhaps more important was Trump's shift on weapons.

According to sources, Trump’s shift in stance on supplying weapons to Ukraine resulted from months of efforts by EU and NATO leaders. Notably, Finnish President Alexander Stubb bonded with Trump during a golf tournament in Florida,