Democratic White House challenger Joe Biden blasted President Donald Trump as a conman during a campaign foray into traditionally Republican territory.
U.S. infectious disease expert Anthony Fauci said on Sunday it would be clear whether a COVID-19 vaccine was safe and effective by early December, but that more widespread vaccination would not be likely until later in 2021.
US coronavirus cases have hit a record daily high as states grapple with a renewed wave of infections.
US President Donald Trump and his White House challenger Joe Biden clashed over Covid and race while trading corruption charges, in their final live TV debate.
US national security officials say Iran was responsible for sending threatening emails to Democratic voters ahead of next month's presidential election.
US President Donald Trump and his predecessor, Barack Obama, have directed blistering attacks at each other during rival rallies.
The Cameron Peak wildfire has become the biggest fire in Colorado state history after burning over 200,000 acres.
Oil giant Exxon has clarified a fundraising claim by Donald Trump that he could raise more money than rival Joe Biden.
Mr Biden deflected again when asked whether his role in helping draft the 1994 crime bill, which the Black Lives Matter movement has blamed for mass incarceration of African Americans, was a mistake.
US President Donald Trump and his Democratic challenger Joe Biden have batted away key questions during duelling meet-the-voter TV events.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.