President Biden has pulled out of a significant campaign event after testing positive for Covid-19.

The White House says Joe Biden has mild symptoms - and will continue to carry out his duties from self-isolation in Delaware.

US correspondent Logan Church says this comes at a terrible time, as Biden needs to prove he's fit and ready for a second term.

"You've got to wonder at this stage how long Joe Biden can really hold on for...at this point, if you look at Joe Biden's public statements, he doesn't want to go anywhere." 

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