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Donald Trump is expected to hit nearly a dozen states in the final week of campaigning as he tries to recover ground from his Democratic rival.
The COVID-19 pandemic, climate change and race were among the topics Trump and Biden debated. They once more offered starkly different views.
While Obama is usually one of the party’s biggest draws and most compelling speakers, that impact may be blunted by the format.
Trump and Biden were supposed to spend Thursday night on the same debate stage in Miami. But that faceoff was scuttled after Trump’s coronavirus infection.
The White House doctor has said the president is not considered a transmission risk, without declaring that he had tested negative for the virus.
"I’m feeling good. Really good. I think perfect," Trump said of his condition. It is not known whether the president is still contagious.
Organisers had said the campaign rivals would debate from separate locations because of the president's COVID-19 diagnosis.
The two main candidates in November's US presidential election will meet for the first of three televised debates early on Wednesday morning European time
Trump and Biden will face off next week in the first of three presidential debates before the high stakes November election.
Amy Coney Barrett has described abortion as "always immoral". The Republican-dominated Senate is planning to confirm her and the Democrats are powerless to stop it.
Ruth Bader Ginsburg is the first woman to lie in state at the US Capitol. Rosa Parks was the first woman to lie in honour at the Capitol, a tribute for non governmental figures.
The US president reiterated comments he made in July in which he said he would have to see what happened before he said he would hand over power.
The US has recorded the highest number of coronavirus deaths and infections in the world, followed by Brazil and India.
US Democratic candidate Joe Biden called President Donald Trump's downplaying of COVID-19 "close to criminal".
The outdoor brand is taking a stand against leaders who "disregard the climate crises and ignore science."