BRUSSELS (Reuters) - The European Commission said on Tuesday there was no evidence that a drug touted by U.S. President Donald Trump as a potential miracle cure against COVID-19 was effective against the disease caused by the new coronavirus. Trump had said that hydroxychloroquine, an anti-malaria drug, could be among "the biggest game changers in the history of medicine" for its potential effects against COVID-19. "The efficacy of hydroxychloroquine in the treatment of COVID-19 patients has to date not been proved," a spokesman for the European Commission said on Tuesday, relaying an internal opinion from the European Medicine Agency. The...