President Trump compares a cotton swab (left) to a swab that could be used in coronavirus testing during a briefing on April 19. Two days prior, Trump erroneously said cotton swabs could be used for coronavirus testing.

President Trump compares a cotton swab (left) to a swab that could be used in coronavirus testing during a briefing on April 19. Two days prior, Trump erroneously said cotton swabs could be used for coronavirus testing.