This is the 606th most frequent Russian word.
байдена
The word "байдена" does not exist in standard Russian; it may be a misspelling, transliteration, or slang referring to "Biden" (as in Joe Biden).
In this sentence, 'байдена' is the genitive form of the last name Байден (Biden), used to signify possession or relation.
Байдена сейчас обсуждают на заседании.
Biden is currently being discussed at the meeting.
Here, 'байдена' is once again in the genitive case, denoting possession (the words of Biden).
Я не услышал слов Байдена на пресс-конференции.
I did not hear Biden's words during the press conference.
In this instance, 'байдена' in the genitive case shows that the policy belongs to Biden.