Diplomats Brace for U.S. Disruption at COP30 as Trump Administration Skips Brazil Summit

Governments worldwide are preparing for possible disruption at the upcoming COP30 climate summit in Brazil, as the Trump administration signals it will not send high-level officials but could still attempt to undermine the talks from the sidelines.

The White House confirmed it will skip the November 10–21 U.N. conference, reiterating President Donald Trump’s stance that climate change is the world’s “greatest con job.” However, U.S. negotiators retain the option to participate at any point before the country formally withdraws from the Paris Agreement in January.

Three European officials told Reuters that the EU is preparing for several scenarios - including the U.S. staying away, attempting to block agreements, or hosting parallel events to criticize global climate policies. The concern follows recent U.S. interventions that derailed a proposed global carbon fee on shipping at the International Maritime Organization (IMO), after Washington allegedly threatened trade penalties and visa restrictions against supportive nations.

Norway’s climate minister Andreas Bjelland Eriksen voiced concern over these tactics, warning that such coercive diplomacy threatens international cooperation. “That a country begins to threaten different types of measures against countries or negotiators… that worries me,” he said.

European diplomats say their top priority at COP30 is to maintain unity around the Paris Agreement. Yet they fear the threat of U.S. retaliation could discourage some nations from taking a firm stand in defense of multilateralism. “If they pull the same tactics, there’s zero chance of rallying around the Paris Agreement in response,” one European official said.

In the U.S., Democratic lawmakers have urged global partners to resist intimidation. Senator Sheldon Whitehouse warned that capitulating to Trump’s approach would embolden further disruption: “If you allow yourself to be intimidated by this administration, they will seize all the ground that you cede to them and then come back for more.”

Some diplomats from small island nations also fear self-censorship among vulnerable countries that depend on U.S. aid or trade access - even if no American officials attend the summit.

Meanwhile, China is stepping into the diplomatic space left by the U.S., emphasizing its support for multilateral climate cooperation. “No one can afford to be left behind in tackling climate change,” China’s foreign ministry said, reaffirming Beijing’s commitment to the global green transition - a field in which its industries already dominate, from solar to battery manufacturing.

Though COP30 will cover a broad range of issues - from climate finance to energy transition - analysts say U.S. opposition could still complicate progress on trade-linked climate measures, including those stemming from the COP28 pledge to transition away from oil and gas.

Despite these tensions, experts say most nations remain committed to preserving the COP process. “There are very few parties that have any interest in busting up the multilateral process,” said David Waskow of the World Resources Institute. “If the U.S. interferes, I think they would find themselves isolated.”

US absence shifts negotiating dynamics at COP30 without removing the underlying disclosure and financing pressures corporates face - if anything, it strengthens what other jurisdictions expect. Our climate-action and market-intelligence teams help clients read what COP outcomes mean for their strategy irrespective of US posture.