President Donald Trump and challenger Joe Biden traded accusations of graft and clashed on the Covid-19 pandemic Thursday but without landing a knockout blow 12 days before the election in a final debate that many saw as Trump's last big chance to change the narrative.

US Director of National Intelligence John Ratcliffe said on Wednesday that Russia and Iran have both tried to interfere with the 2020 presidential election.

President Donald Trump spent a decade unsuccessfully pursuing projects in China, operating an office there during his first run for president and forging a partnership with a major government-controlled company, The New York Times reported.

The final debate between President Donald Trump and Democratic rival Joe Biden will feature a mute button to allow each candidate to speak uninterrupted, organisers said on Monday, looking to avoid the disruptions that marred the first matchup.

The October 15 presidential debate between President Donald Trump and Democratic nominee Joe Biden will not proceed, the Commission on Presidential Debates said in a statement on Friday, adding that both campaigns had announced "alternate plans for that date."

US President Donald Trump's physician said on Thursday that the president had completed his course of therapy for the coronavirus, had remained stable since returning to the White House, and could return to public engagements on Saturday.

There are many unanswered questions surrounding President Donald Trump’s Covid-19 diagnosis and treatment. White House press secretary Kayleigh McEnany said he only had mild symptoms, and his doctor said Trump was fatigued. But the president was being flown to Walter Reed Medical Center, where he was expected to stay a few days.

US President Donald Trump is in a military hospital for treatment after testing positive for Covid-19, an extraordinary development that upended the presidential race a month before the November 3 election. In a tweet, the president wrote: "Going well, I think! Thank you to all. LOVE!!!"

News of the infection of the most powerful man in the world with the most notorious disease in the world drew instant reactions of shock, sympathy, undisguised glee and, of course, the ever-present outrage and curiosity that follow much of what Donald Trump does, even from 10,000 miles away.

US stock futures and Asian shares fall after President Donald Trump said he and first lady Melania Trump had tested positive for the new coronavirus.

President Donald Trump and first lady Melania Trump have tested positive for the coronavirus, the president tweets.

President Donald Trump and Democratic rival Joe Biden battled fiercely over Trump's record on the coronavirus pandemic, healthcare and the economy in a chaotic and bad-tempered first debate marked by personal insults and Trump's repeated interruptions.

A suspect was shot dead by police and there were "multiple fatalities" in a reported hostage situation at a home in Salem, Oregon, but no officers were injured, police reports.

Two police officers are shot and wounded in Louisville, Kentucky, during protests of a grand jury ruling decried by civil rights activists as a miscarriage of justice in the fatal police shooting of Breonna Taylor in March.

The US death toll from the coronavirus topped 200,000, by far the highest in the world, hitting the once-unimaginable threshold six weeks before an election that is certain to be a referendum in part on President Donald Trump’s handling of the crisis.

Manhattan's district attorney says he might have grounds to investigate President Donald Trump and his businesses for tax fraud, as he seeks to persuade a federal appeals court to let him obtain Trump's tax returns.

Hurricane Sally lumbered ashore near the Florida-Alabama line Wednesday with 105 mph (165 kph) winds and rain measured in feet, not inches, killing at least one person, swamping homes and forcing the rescue of hundreds as it pushed inland for what could be a slow and disastrous drenching across the Deep South.

Joe Biden brands President Donald Trump a "climate arsonist" for refusing to acknowledge global warming's role in deadly wildfires sweeping the western United States, while Trump blames lax forestry and declares, "I don't think science knows."

Three people died in a wind-whipped Northern California wildfire that has forced thousands of people from their homes while carving a 25-mile path of destruction through mountainous terrain and parched foothills, authorities say.

Republican President Donald Trump, accused by Joe Biden of putting lives at risk in his handling of the coronavirus, on Monday called his Democratic rival "stupid" and demanded an apology for what Trump called anti-vaccine rhetoric.