LONDON (Reuters) -Russia said on Saturday it had so far banned 963 Americans from entering the country – including previously announced moves against President Joe Biden and other top officials – and would continue to retaliate against what it called hostile U.S. actions. The largely symbolic travel bans form part of a downward spiral in Russia’s relations with the West since its Feb. 24 invasion of Ukraine, which prompted Washington and its allies to impose drastic sanctions on Moscow and step up arms supplies to Ukraine. Separately, the Foreign Ministry said it had added 26 new names to a li…