Secretary of State John F. Kerry took the stage at United Nations climate talks in Morocco on Wednesday, seeking to reassure nervous negotiators that a groundbreaking agreement to fight global warming will survive with Donald Trump in the White House.

The Republican president-elect has called climate change a “hoax” and said he would “cancel” the United States’ participation in the accord reached in Paris last year.

But Kerry said, “No one should doubt the overwhelming majority of the citizens of the United States who know climate change is happening and who are determined to keep our commitments that were made in Paris.”