Trump defends disproved COVID-19 treatment

President Donald Trump speaks during a news conference at the White House, Tuesday, July 28, 2020, in Washington. (AP Photo/Evan Vucci)

WASHINGTON — President Donald Trump issued a stout defense Tuesday of a disproved use of a malaria drug as a treatment for the coronavirus, hours after social media companies moved to take down videos promoting its use as potentially harmful misinformation.