The charges intensified the administration’s efforts to go after the law enforcement and intelligence personnel who cast doubt on unsubstantiated claims that Joseph R. Biden Jr. engaged in corrupt dealings in Ukraine.
Senators have warned the White House they will withhold confirmation votes until the administration ensures the restoration of communications capabilities used by Ukraine’s military.
Representative Brian Fitzpatrick, Republican of Pennsylvania and a former F.B.I. agent who worked on Russian counterintelligence in Kyiv, said he doubted the communication problems were accidental.