Russia-U.S. relations have been in tatters with Washington accusing the Kremlin of interference in U.S. elections, a massive cyber attack and other hostile activity.
Joe Biden has increased pressure on Moscow since becoming U.S. president, and comments he made likening Russian counterpart Vladimir Putin to a killer were met with fierce criticism in Moscow.
Washington in April announced a new round of sanctions including the expulsion of 10 diplomats and a restriction on U.S. banks trading in Russian government debt.
Moscow responded by expelling 10 U.S. diplomats, banning top U.S. officials from entering the country and prohibiting the U.S. Embassy from employing foreign nationals.
Moscow and Washington are however discussing a possible summit between Biden and Putin in June hosted by a third country.