With President Trump on their side, U.S. technology companies now have more leverage in Brazil, where they seek to influence new rules policing their platforms.

© Dado Galdieri for The New York Times

The president has threatened more tariffs on Russia and its trading partners and has imposed harsh ones on India and Brazil to try to sway matters of war and politics.

© Dado Galdieri for The New York Times

The tanker, the Eagle S, was detained last December.

© Jussi Nukari/Agence France-Presse — Getty Images

The American leader has agreed to a meeting with the Russian president in Alaska next Friday to discuss ending the war in Ukraine.

© Erin Schaff/The New York Times

President Trump accused India of aiding Moscow’s war on Ukraine by purchasing Russian energy, derailing trade talks between India and the United States.

Vladimir Putin has lost faith in the very idea of reaching agreements with the United States.

Readers respond to the president’s latest turn in the war. Also: President Trump and Rosie O’Donnell; New Yorkers’ health; travel medical kits.

New payment systems allow users and banks to bypass the U.S. currency and sanctions.

New payment systems allow users and banks to bypass the U.S. currency and sanctions.

The alliance of emerging economies hopes to offer a counterweight to the United States and other Western powers. But military strikes on Iran are testing its unity.

The Kalma Beach resort town, one of Kim Jong-un’s most ambitious projects aimed at attracting foreign tourists, may not draw the waves of visitors he wants.

China has become trendy for Russians who once worshiped everything Western. Young people are learning Mandarin, and Chinese culture and goods have become ubiquitous in Moscow.

China has become trendy for Russians who once worshiped everything Western. Young people are learning Mandarin, and Chinese culture and goods have become ubiquitous in Moscow.

Iran’s retaliation against Israel’s attacks Friday raised concerns that a broader Middle East conflict would disrupt the world’s energy supplies and stoke inflation.

The military strikes jolted investors, raising concerns that a broader Mideast conflict would disrupt the world’s energy supplies.

Under three presidential administrations, officials in Washington have used export controls to hold back China’s access to advanced technology.

Experts and former officials said it was unusual for a cabinet secretary to try to influence the Treasury Department’s sanctions process to target a domestic entity.

China has leverage it can use by limiting access to its rare earth supplies, but it does not want to sacrifice its reputation as a reliable supplier.

Experts and former officials said it was unusual for a cabinet secretary to try to influence the Treasury Department’s sanctions process to target a domestic entity.

China produces the entire world’s supply of samarium, a rare earth metal that the United States and its allies need to rebuild inventories of fighter jets, missiles and other hardware.