On Capitol Hill, the Senate Homeland Security Committee chair, Wisconsin Republican Senator Ron Johnson, has invited members of a fringe medical association to testify on the coronavirus pandemic. The lead witness, Dr. Jane M. Orient, has expressed anti-vaccine views and has pushed the use of hydroxychloroquine — an antimalarial drug once promoted by President Trump, which can cause heart rhythm problems and showed no benefit in treating COVID-19. Another witness testifying today, Dr. Ramin Oskoui, has falsely claimed that masks and social distancing don’t work at combating the spread of coronavirus.