President Trump, who is 71 years old, called 75-year-old Joe Biden "mentally and physically weak" on Thursday, adding that Biden "would go down fast and hard, crying all the way."

The context: Biden said Tuesday he'd "take [Trump] behind the gym and beat the hell out of him," if the two of them were in high school and Trump made the crude comments about women that were caught in the Access Hollywood video. The former Vice President made the remarks at a University of Miami event.

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The pandemic real estate market

Illustration: Annelise Capossela/Axios

It's not just emotional buying, real estate agents say: There are smart and strategic reasons that Americans of all ages, races and incomes are moving away from urban centers.

Why it matters: Bidding wars, frantic plays for a big suburban house with a pool, buying a property sight unseen — they're all part of Americans' calculus that our lives and lifestyles have been permanently changed by coronavirus and that we'll need more space (indoors and out) for the long term.

41 mins ago - Health

Coronavirus cases are falling, but don't get too comfortable

Data: The COVID Tracking Project, state health departments; Map: Andrew Witherspoon, Danielle Alberti, Sara Wise/Axios

America's coronavirus outbreak is slowing down after a summer of explosive growth.

By the numbers: The U.S. is averaging roughly 52,000 new cases per day — still a lot of cases, but about 10.5% fewer than it was averaging last week.

41 mins ago - Health

We're doing a lot less coronavirus testing

Data: The COVID Tracking Project; Chart: Andrew Witherspoon/Axios

The U.S. is cutting back on coronavirus testing. Nationally, the number of tests performed each day is about 17% lower than it was at the end of July, and testing is also declining in hard-hit states.

Why it matters: This big reduction in testing has helped clear away delays that undermined the response to the pandemic. But doing fewer tests can also undermine the response to the pandemic.