Trump is 'clearly flirting with disaster' by holding rallies and not wearing a mask, health expert warns - CNN

He was in a tightly packed venue with thousands of people, almost all who were not wearing masks, and this is how you get, how you acquire, the virus," Reiner said.

Trump said earlier this week that he would have "no problem" wearing a face mask in public in certain circumstances -- a pivot from his months-long refusal to wear one in public at events where social distancing was not always observed.

When asked whether he would wear a mask, Trump told Fox Business in a White House interview, "Oh, I would.

If I'm in a group of people where we're not 10 feet away -- but usually I'm not in that position and everyone's tested."

Trump said he didn't believe making masks mandatory across the country was necessary but claimed that he is "all for masks" and he thinks "masks are good."

Still, the President hasn't worn a face mask in front of cameras since the US Centers for Disease Control and Prevention provided new guidelines in April encouraging Americans to wear facial coverings when social distancing was not an option.

When the CDC guidelines went into effect, Trump told reporters he probably wouldn't adopt the practice.

"I don't think I'm going to be doing it," he said at the time.