A source in the Russian foreign ministry has said US national security advisor Susan Rice should urge her own country, rather than Russia, to avoid the use of force in Ukraine.
The remarks come after Rice, President Barack Obama's National Security Advisor, said that the possibility of Russia sending troops to the Ukraine would be a "grave mistake".
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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.