It's too simple to argue that Donald Trump is weak on Russia and that Joe Biden is strong. Biden has been weak on Putin in some areas, and Trump is complicated.
The Kremlin last week announced the expulsion of six Foreign Office staff from Russia and claimed to have evidence they were engaged in spying and sabotage.
A Ukrainian drone strike hit a Russian weapons depot reportedly caused a 2.8 magnitude earthquake and a huge blast captured in a social media post showed a massive explosion.