But the Trump administration is already moving to completely eliminate climate change funding. Mr. Trump’s budget blueprint drops support for the Global Climate Change Initiative and payments to United Nations climate change programs. And in his June 1 announcement, the president reiterated that the United States would no longer make its pledged payments to the Green Climate Fund.

President Trump’s decision to withdraw from the climate pact seems to be part of a broader policy of disengagement from international affairs that will ultimately hurt the United States’ relationships with Latin American countries. Mr. Trump’s “America first” foreign policy ostensibly aims to strengthen American interests and national security, and Mr. Trump has indicated he will prioritize defense over international cooperation. The president’s budget, presented to Congress on May 16, proposes to cut funding to the State Department by 30 percent compared with the previous year while increasing military spending.

For now, many of the Obama administration’s clean-energy initiatives with Latin America and the Caribbean remain in place. Clean-energy-related assistance to Central America and the Caribbean, part of larger aid packages already approved by Congress, appear to be on track. The United States is also still planning to participate in the ministerial meeting of the Energy and Climate Partnership of the Americas — an Obama administration initiative — in Chile in September. But proposed budget cuts, combined with the decision to pull out of Paris, put into question how long this cooperation will continue. The lack of appointments to key senior leadership positions on Latin America — for example, Mr. Trump has not nominated a new assistant secretary for Western Hemisphere affairs at the State Department — also inhibit the administration’s ability to take a proactive approach to engagement with the region. The lack of leadership on both Western Hemisphere affairs and climate change issues in the administration undermine cooperation with the United States’ allies in the region.

After Mr. Trump’s announcement, many Latin American leaders condemned the United States’ decision to leave the Paris accord and vowed to meet their climate change targets nevertheless. With the dramatic fall in renewable energy costs and gains in energy efficiency, clean energy is often more cost-effective anyway. However, meeting the global challenges of fighting and adapting to climate change requires global cooperation, and the United States’ decision to withdraw from this international partnership will damage its standing with Latin America and the rest of the world.