WASHINGTON (AP) — During their second meeting in the Oval Office this year, President Donald Trump said the U.S. would be willing to support European efforts to police any peace deal in Ukraine, while its leader, Volodymyr Zelenskyy expressed his gratitude and wore dressier clothes.

And Vice President JD Vance kept his mouth shut.

As Trump hosted Zelenskyy and top European leaders to energize months of stalled U.S.-led efforts to halt Russia’s 3 1/2-year-old war, the tone and style of the sit-down was far different than when Ukraine’s president was hounded out of the White House in February.

Following the talks, Trump called and spoke at length to Russian President Vladimir Putin who got the red carpet treatment at a summit with Trump last Friday in Alaska, to discuss the extraordinary gathering of allies. Trump said he would now work to arrange a meeting between Zelenskyy and Putin.

Here are key takeaways:

Trump says the US could back security guarantees for Ukraine

A central question for peace talks is how to prevent further Russian aggression in the future.

Trump has ruled out allowing Ukraine to join NATO, which would extend the military alliance’s protection to the besieged country. He did, however, express support for security guarantees for Ukraine — though details remain vague.

European countries “want to give protection and they feel very strongly about it and we’ll help them out with that,” Trump said.

That pleased Zelenskyy, who said the U.S. was offering “such (a) strong signal.”

With Europeans looking to set up a force that could backstop any peace agreement in Ukraine, Trump suggested that Putin would be open to accepting security guarantees. His special envoy, Steve Witkoff, said Sunday that Moscow was open to accepting NATO-style protections for Ukraine.

European leaders applauded that notion, and the larger meaning it would carry.

“When we speak about security guarantees, we speak about the whole security of the European continent,” French President Emmanuel Macron said.

Macron said talks to determine what the U.S. is willing to provide will start as soon as Tuesday.