Clinical trials in China are getting attention at an international oncology gathering in Chicago. China’s surging biotechnology industry is fueling alarm that U.S. dominance in the field is waning.

The billionaire’s new roots in Argentina are said to be partly motivated by concerns about the future of the United States and shared beliefs with Argentina’s right-wing leader.

The U.S. oil giant is negotiating a deal to pump oil in Venezuela, ending a standoff with its socialist rulers and marking a victory for President Trump.

© Adriana Loureiro Fernandez for The New York Times