Police have also revealed they recovered "several items of literature which could be viewed by some as potentially inflammatory" from a house in Salford on Thursday.
The material was reported to be extreme right-wing leaflets.
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The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.