On September 20, 2018 the White House released the US National Cyber Strategy, which was signed by President Donald Trump.
The US has imposed new sanctions against Russia, for this time in relation to cyber-attacks. However, Moscow's involvement in them has not been proved.
In addition, 35 Russian diplomats were declared to be “the persona non grata” and they are going to be expelled from the country within 72 hours. Moreover, two diplomatic missions will be closed.