F.B.I. agents on Wednesday morning also executed a search warrant at the Washington-area home of Victoria Toensing, a lawyer close to Mr. Giuliani who had dealings with several Ukrainians involved in the effort to find damaging information about the Bidens, according to people with knowledge of that search. Ms. Toensing has represented Dmitry Firtash, a Ukrainian oligarch under indictment in the United States whose help Mr. Giuliani sought.
