Health experts have recommended against holding large events like rallies, concerts and sports games, where coronavirus could spread easily among shoulder-to-shoulder crowds. The White House said attendees of Saturday's rally "assume a personal risk" and are required to agree not to sue the Trump campaign over potential virus exposure.

Presumptive Democratic nominee Joe Biden has sworn off rallies amid the pandemic and has largely held virtual events out of his basement in Wilmington, Del.

Attendees of Trump's Saturday rally won't be required to wear masks, but most voters have a favorable view of people wearing masks as protection against the spread of coronavirus, according to the Fox News poll.

About 80 percent of respondents had a favorable view of masks, according to the poll. Just under 70 percent of Republicans approved of mask-wearing, compared to 89 percent of Democrats, according to the poll. And of those that "strongly approve of Trump," 61 percent approved of face coverings.

Health care experts have urged people to don face coverings to limit the spread of the coronavirus, which has so far killed almost 120,000 people in the U.S. California on Thursday announced it would require people to wear face masks in public, and many states recommend face coverings in supermarkets and on public transit.

But face coverings have become the center of the coronavirus culture war. A California health officer resigned after she received death threats for her mask mandate in Orange County, and Trump has refused to wear a mask in public despite a recommendation from the Centers for Disease Control and Prevention.

According to the Fox News poll, 44 percent of voters approve of Trump's coronavirus response, down from 51 percent in April.

The Fox News poll included responses from cellphone and landline interviews with random national sample of 1,343 registered voters, with a margin of error of plus or minus 2.5 percentage points.