EMERGING MARKETS-Latam currencies weaken on China; Argentine assets spike on Macri

(Updates prices) SAO PAULO/MEXICO CITY, Nov 23 (Reuters) - Latin American currencies weakened on Monday as persistent worries about the Chinese economy hit commodity prices and reduced the demand for high-yielding emerging market assets. The Chilean peso dropped 0.59 percent after prices of copper, the country's main export, fell to the lowest level in more than six years. The Brazilian real was flat. Argentine markets were a bright spot after conservative opposition challenger M