U.S. sanctions, including the blacklisting of Huawei and moves to cut the Chinese company off from key semiconductor supplies, are weighing on the results.
The U.S. Food and Drug Administration approved Gilead Sciences' antiviral drug remdesivir for the virus. The intravenous drug has helped shorten the recovery time of some hospitalized Covid-19 patients.
White House press secretary Kayleigh McEnany told reporters Trump was tested for Covid-19 on Air Force One as he traveled to the debate hall in Nashville.
"We're about 1.6 million tons a year of our products going to automotive. Will double that in the next several years," Nucor CEO Leon Topalian told CNBC.
Elizabeth Warren and Ro Khanna called on top Democrats and Republicans in the House and Senate to "lay the groundwork to prevent and mitigate future pandemics."