Joe Biden warned Vladimir Putin that the US would respond to “malign actions” by Russia as the two presidents discussed an extension to a crucial nuclear weapons deal during their first phone call.
Jen Psaki, the White House press secretary, said Mr Biden and Mr Putin had spoken on Tuesday afternoon about the US’s “willingness to extend New Start for five years”, referring to the arms control treaty that is due to expire in the coming days.
She also said the new US president had raised a number of issues that his predecessor, Donald Trump, had been reluctant to bring up with his Russian counterpart, which had drawn criticism that the former president was too cosy with Mr Putin.
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