Gov.

Gavin Newsom attended COP30 in Belém, Brazil, on Nov.

11-13, 2025, and signed international climate partnerships with Brazil and Nigeria.

The White House said it would not send high-level officials to the summit, but some U.S.

participants, including Sen.

Sheldon Whitehouse, still attended.

Newsom called the administration's absence an "abomination" and positioned California as a stable climate partner.

President Trump has long called climate action a "hoax" and, during his earlier term, initiated the U.S.

withdrawal from the Paris Agreement.

He has signaled less federal support for international climate efforts, leaving states like California to lead diplomatic initiatives.