Jabin Botsford/The Washington Post via Getty Images Dr. Deborah Birx told FOX News' Chris Wallace on Sunday that there is "clear scientific evidence" that masks help prevent the spread of COVID-19. Birx said she assumed Trump is "able to maintain that six feet distance" when asked by Wallace whether she wished Trump would wear a mask in public. Trump has been criticized for repeatedly refusing to wear a mask during public appearances, including during visits to a Ford plant in Michigan and a Honeywell factory in Arizona earlier this month. Birx said Americans should wear masks in public when they're not able to socially distance "out of respect for each other." Visit Business Insider's homepage for more stories. Dr.