Professor of History at the University of California
Jeffrey Wasserstrom, Professor of History at the University of California, Irvine, is the editor of The Oxford Illustrated History of Modern China.
When Donald Trump won the US presidential election in November, he had a lot of Chinese fans. But his popularity has since plummeted, owing to his statements on contentious issues, such as Taiwan and the South China Sea. This isn't the first time China's view of a US leader has deteriorated rapidly.