Former Secretary of State John Kerry has been quietly meeting with world diplomats in a lobbying effort to save the Iran nuclear deal, a report revealed Friday.

In recent weeks, he has met in person with Iranian Foreign Minister Mohammad Javad Zarif and German President Frank-Walter Steinmeier, and spoken on the phone with top EU official Federica Mogherini, The Boston Globe reported.

Kerry wants to save the Obama administration’s signature foreign-policy pact that President Trump has said he wants to kill. The US has until May 12 to withdraw from the deal.

The White House had no comment.