PARIS, AP, April 26, 2018  — France’s Emmanuel Macron has defended discussions with U.S. President Donald Trump for a new plan to curb Iranian nuclear weapons.

Speaking to reporters before leaving Washington on Wednesday night, the French president said the new four-pronged agreement would be a “very important complement” to the existing 2015 accord.

French President Emmanuel Macron gestures as he is introduced before speaking at a joint meeting of Congress on Capitol Hill in Washington, Wednesday, April 25, 2018. Standing behind him are Vice President Mike Pence and House Speaker Paul Ryan of Wis. 

French President Emmanuel Macron, right, shakes hands after speaking to students at George Washington University, Wednesday, April 25, 2018, in Washington

The plan announced during Macron’s trip is part of European efforts to persuade Trump not to abandon the accord next month.

French President Emmanuel Macron smiles as he listens to a question in French from a student at George Washington University, Wednesday, April 25, 2018, in Washington. 

Trump calls the 2015 accord flawed. Iran’s president insisted the deal cannot be changed or built on.

Macron insisted on the importance of talking to all sides, including Iran ally Russia, and said the world shouldn’t force anything on Iran. He acknowledged that he doesn’t know what Trump will decide.

French President Emmanuel Macron touches his hand to his heart as he finishes his address to a joint meeting of Congress with Vice President Mike Pence and House Speaker Paul Ryan applauding at left, at the Capitol in Washington, Wednesday, April 25, 2018. 

German Chancellor Angela Merkel will discuss Iran with Trump on a visit Friday.