Trump expressed support in the call for a European peacekeeping force in Zelensky call

Axios has some details on yesterday's call between Trump and Zelensky:

• Trump expressed support in the call for a European peacekeeping force as a part of security guarantee possible solution
• Asked that Zelensky appoint his own negotiating team..
• "Zelensky's message to Trump was 'you have leverage over Putin," a source said.
• "Putin told you he wants a deal only because he is afraid of you, because you are strong," Zelensky told Trump, according to the sources.

Zelensky really trying for the flattery there. I find it odd that someone in the White House is leaking this... why?