At a time when doctors, nurses and health care professionals are working to exhaustion and risking their own safety to treat the COVID-19 outbreak, Fox News and other pro-Trump media outlets have repeatedly given a platform to dubious coronavirus experts with phony or misidentified medical credentials. This week, Fox News host Laura Ingraham featured Dr. William Grace, who was billed as “an oncologist with Lenox Hill Hospital in New York City,” to talk about the use of hydroxychloroquine ― an unproven drug treatment that President Donald Trump has repeatedly praised. Grace talked about the situation “in the trenches” and suggested...