Brazilian President Luiz Inácio Lula da Silva’s India visit last week sent important messages for both India-Brazil ties, and for solidarity in the developing world, as two Global South powers focused on global governance and leadership.

After his talks with Prime Minister Narendra Modi, India and Brazil agreed to try and double trade to $30 billion by 2030, and signed agreements on critical minerals, steel mining, and digital cooperation to diversify beyond China-led supply chains.

Mr. Lula, along with French President Emmanuel Macron, was among about 20 leaders at India’s AI Impact Summit and was later accorded a state visit.

The 80-year-old Brazilian President’s presence was important, as he faces elections later this year, which may make it difficult for him to attend India’s BRICS summit if it coincides with his campaigning for a fourth term.

It also came amidst fresh turmoil over U.S.-imposed trade tariffs, after the American Supreme Court struck down U.S. President Donald Trump’s rationale for the reciprocal tariffs.

India and Brazil were both the highest taxed countries by the U.S. — 50% tariffs each — and both faced further possible tariffs over BRICS ties, Iran trade, and Russian oil imports.

India and Brazil are also key members of the BRICS grouping of developing nations, the India-Brazil-South Africa (IBSA), G-4 with Germany and South Africa on UNSC reform, and co-founders of the biofuel alliance for alternative energy; each of these has faced challenges from Mr. Trump’s policies on trade, territorial sovereignty, multilateralism and the UN, and fossil fuels.

Amid such uncertainty, Mr. Modi and Mr. Lula reaffirmed their commitment to protecting the multilateral order.

Before leaving India, Mr. Lula, who is set to visit Washington next month, did not mince words while speaking to journalists about the challenges posed by the U.S. government.

As a former trade union leader, he said he believed that the only way of tackling geopolitical uncertainty unleashed by the U.S. was for countries to “unionise”, rather than cutting deals individually with Washington, which leave smaller nations at a disadvantage.

The words are particularly important for both Delhi and Brasilia, as both have negotiated with the Trump administration on tariffs, but have not so far signed trade deals with the U.S.

The U.S. court ruling offers an opportunity to reset the terms of the agreements, and it is significant that New Delhi has postponed a meeting of trade negotiators this week to give the U.S. and India time to assess the ruling.

India and Brazil, and their developing world partners, should coordinate the next steps and stay engaged with Washington.

Mr. Lula’s warning is clear: it is easy to break a single stick, but far more difficult to do so if the sticks are bundled tightly together.