The US expelled 60 Russian diplomats today, 26th March 2018. How many diplomats from Russia are in the US, at embassies, consulates, etc.?
Officially, 455 Russian diplomats were active in the US before the March 2018 expulsion.
"Moscow retaliated by giving the US the deadline to reduce its diplomatic staff in Russia
to 455 people, matching the number of Russian diplomats left in the US after Washington expelled 35 Russians in December." — The Guardian, 30 July 2017 (highlight mine).