Graham vows to publicly question whistleblowers if Trump is impeached

Sen. Lindsey GrahamLindsey Olin GrahamRestlessness, light rule-breaking and milk spotted on Senate floor as impeachment trial rolls on Senator-jurors who may not be impartial? Remove them for cause Broad, bipartisan rebuke for proposal to pull troops from Africa MORE (R-S.C.) promised to question the whistleblowers publicly if President TrumpDonald John TrumpMnuchin knocks Greta Thunberg's activism: Study economics and then 'come back' to us The Hill's Morning Report - House prosecutes Trump as 'lawless,' 'corrupt' What to watch for on Day 3 of Senate impeachment trial MORE ends up being impeached.

Graham said on Fox News' "Sunday Morning Futures" that if the president is impeached, he intends to have the whistleblowers testify in the Senate if they don't go before the House. 

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"If the whistleblowers' allegations are turned into an impeachment article, it's imperative that the whistle-blower be interviewed in public, under oath and cross-examined. Nobody in America goes to jail or has anything done to them without confronting their accuser," he told host Maria BartiromoMaria Sara BartiromoTrump defenders argue president can't be removed for abuse of power Trump lawyer: Abuse of power, obstruction articles 'have not fared well' Cruz: Hearing from witnesses could extend Senate trial to up to 8 weeks MORE.

The South Carolina senator said the whistleblowers need to come forward so the "public can judge their credibility."

The House opened the impeachment inquiry after reports emerged of a call in which Trump asked the Ukrainian president to investigate former Vice President Joe BidenJoe BidenThe Hill's Morning Report - House prosecutes Trump as 'lawless,' 'corrupt' What to watch for on Day 3 of Senate impeachment trial Sanders wants one-on-one fight with Biden MORE following Trump's decision to withhold military aid from the country. 

A whistleblower report on the call thrust the conversation into the spotlight, and the White House released a partial readout of the call. A second whistleblower, who reportedly has firsthand knowledge of the events, has also talked to the intelligence community's inspector general.

Graham compared the whistleblower accusations to "unverifiable" allegations of sexual assault against Supreme Court Justice Brett KavanaughBrett Michael KavanaughCollins walks impeachment tightrope Supreme Court sharply divided over state aid for religious schools How Citizens United altered America's political landscape MORE last year. 

"This is Kavanaugh all over again," he said.