Israel National NewsGlobal NewsGraham: Impeachment is invalid without whistleblower's identityGraham: Impeachment is invalid without whistleblower's identitySouth Carolina Republican Sen. Lindsey Graham says we need to know what the background is of the whistleblower. Nov 11, 2019, 5:21 PM (GMT+2)Lindsey Graham Found a mistake? Contact usGet the latest news in your mailbox