Anthony Fauci
Change of heart follows a weekend of golf and after two Yankees players knelt during the national anthem at a stadium in Washington.
The president also took a jab at Anthony Fauci, calling the country's top infectious disease expert "a little bit of an alarmist."
The ongoing pandemic shows just how dangerous, and deadly, his continued rejection of science and expertise can be.
The daily increase could reach 100,000 unless a nationwide push is made to tamp down the fast-spreading, according to Dr Anthony Fauci.
Across the country, cases of Covid-19 are suddenly surging, particularly in states that had begun to reopen.
Nation’s top infectious disease expert raises fears over surging infections in Texas, Arizona and Florida.
Texas, Arizona and Florida all reported the highest single-day increases in coronavirus cases on Tuesday.
The president is planning rallies and retreating from the fight against Covid-19 just as many states are gripped by their worst outbreaks yet.
Dr Anthony Fauci says a lot is still unknown about Covid-19.
The chilling message was part of a filmed report on the protest by TV journalist Kevin Vesey, who has become a target of Trump on Twitter.