US Vice President Mike Pence's chief of staff Marc Short tested positive for Covid-19 on Saturday, said a spokesman.

The number of confirmed COVID-19 cases in the United States surpassed the 4-million mark on Thursday, according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.

Despite a spike in coronavirus cases in the country, U.S. President Donald Trump said on Tuesday the White House will push state governors hard to get schools opened in the fall.

The United States is "not in total control" of the coronavirus pandemic and COVID-19 cases in the country  go up to 100,000 per day if the current trend "does not turn around," Anthony Fauci, the U.S. government's top infectious-diseases expert, said on Tuesday.

Amid alarming rise in Covid-19 cases , President Donald Trump on Saturday asked his administration to slow down coronavirus testing because robust testing turns up too many cases of virus infection.

U.S. President Donald Trump held his first rally in more than three months in Tulsa, Oklahoma on Saturday evening, despite warnings from health experts against large-scale gatherings amid a surge in coronavirus cases after reopening in some states.

Three members of the White House coronavirus task force, including Dr. Anthony Fauci, placed themselves in quarantine after contact with someone who tested positive for COVID-19.

The number of COVID-19 deaths in the United States topped 65,000 on Saturday morning, reaching 65,244 as of 12:00 a.m. (1600 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.

The coronavirus cases in the US has exceeded 1 million with the death toll exceeding 57,000 on Tuesday, showed the latest data.

President Donald Trump says states should "seriously consider" reopening their public schools before the end of the academic year, even though dozens already have said it would be unsafe for students to return until the summer or fall.