Joe Biden doesn’t occupy a political office, isn’t a great orator and is basically stuck in his house. It’s not much of a platform for projecting leadership during the coronavirus crisis. That was laid bare Monday as the presumptive Democratic presidential nominee gave his first coronavirus shadow briefing webcast. Biden’s been outgunned by President Donald Trump and outshone by some of the nation’s governors, among them New York’s Andrew Cuomo, whose crisis response efforts are drawing rave reviews. The former vice president was staid and somber, even as his remarks were marred by a few minor real-time snafus and slip-ups....