In an interview with Maria Bartiromo on FNC's "Sunday Morning Futures," Sen. Lindsey Graham vowed to "get to the bottom" of why former FBI director James Comey opened a counterintelligence investigation into the Trump campaign in 2016.



"Mueller will let us know in a couple of weeks, but what I'm going to do is look at the Department of Justice and the FBI and look at the other side of the story," Graham, chairman of the Senate Judiciary Committee, said. "How was a counterintelligence investigation opened up against the Trump campaign? How did they get a warrant on an American citizen on four separate occasions based on a document paid for by the Democratic Party that was a bunch of garbage? We're going to find out about that too."



"Every American should be worried about what happened in 2016," Graham said. "Was this an effort by the Department of Justice and the FBI senior officials to fix an election, to undercut a president who was legitimately elected?"











"Remember when Dianne Feinstein had a staff member that was working for the Chinese intelligence community? The FBI went to her and told her about it, she fired them. Why did they not do the same for Trump?" Graham asked.



"Did they try to invoke the 25th Amendment? Did they lie to the FISA court? Did they open up a counterintelligence investigation against Trump in a sham way?"



"So you're committing to getting to the bottom of it through your subpoena power. You're going to get these guys here to testify. And you said the last time you were here that you're going to get all the people who signed on to that warrant, that would include Rod Rosenstein, Sally Yates, who else? Peter Strzok?" host Maria Bartiromo asked.



"Comey," Graham replied. "How could the Department of Justice tell the FISA court that the dossier prepared by Christopher Steele was reliable? ... How could they certify that same document was reliable enough to get a warrant? To this day it is not verified. It was a product produced by a foreign agent, paid for by the Democratic Party. Could you imagine if the Republicans had hired somebody to go to Russia and spy on Hillary Clinton, and they produced a document that was a bunch of garbage?"



"So yeah, I'm going to get to the bottom of this," he promised.





SEN. LINDSEY GRAHAM: Under the regulations, the Attorney General has to report to me and the ranking member Dianne Feinstein a summary of what was found [by the Mueller investigation]. Who is going to be pursued criminally, if anyone at all. Kind of a summary. He doesn't have to give us the entire report.



But my belief is that "collusion" really is "conspiracy" and nobody has been charged with the crime of conspiracy. Everybody who has been charged has been process crimes or financial crimes, so my belief is that there is no collusion between the Trump campaign and the Russians, and if there had been, somebody would have been charged by now with conspiracy, but we'll know in a couple weeks.



MARIA BARTIROMO: Well doesn't somebody have to come out and say that, then? Honestly, senator, it has been two years. This collusion idea is in the zeitgeist out there, you've got Adam Schiff continuing this narrative that he has more than circumstantial evidence that there was collusion and he's got nothing to show for it and nobody puts him on the spot about it. Can you just keep hearing this stuff float around or is somebody actually going to come out in authority and say there was no collusion?



GRAHAM: I think Mueller is going to be the person most people listen to, not Adam Schiff. The Mueller report will be out soon. If there is no evidence of collusion between the Trump campaign and the Russian intelligence community, then that should be the end of all this.



I have seen no evidence of collusion, and if the Democrats keep pushing this, it's going to blow up in their face in 2020.



Mueller will let us know in a couple of weeks, but what I'm going to do is look at the Department of Justice and the FBI and look at the other side of the story. How was a counterintelligence investigation opened up against the Trump campaign? How did they get a warrant on an American citizen on four separate occasions based on a document paid for by the Democratic Party that was a bunch of garbage?



We're going to find out about that too.



BARTIROMO: That's exactly right. We're going to talk to Trey Gowdy coming up and one thing he made a point of telling me going into this interview was that there were actually three investigations happening, which is what we heard from Andrew McCabe on this book tour, even though he has been criminally referred for criminal charges there.



What are you expecting from [Attorney General] Bill Barr? He's on the job two weeks. No doubt he's probably already sat with Robert Mueller, right?



GRAHAM: Right. I'm expecting him to clean up the place. Number one going forward, what are the rules to open up a counterintelligence investigation on a presidential campaign? I believe foreign governments were trying to get inside the Clinton campaign. They're going to be doing this in the future. They're always going to be coming after us.



Remember when Dianne Feinstein had a staff member that was working for the Chinese intelligence community? The FBI went to her and told her about it, she fired them. Why did they not do the same for Trump?



The counterintelligence investigation of the Trump campaign, I think, was a backdoor attempt to infiltrate the campaign. They used a confidential informant. Well, what did the confidential informant find about the Trump campaign and Russia?



Apparently, nothing, because there was no mention of a confidential informant in obtaining a warrant against Carter Page.



So this is a real mess. Did they really sit down and try to overthrow the president by invoking the 25th Amendment? I’m going to get to the bottom of that. I’m going to have McCabe come in, Rosenstein come in, anybody and everybody around that conversation and we’re going to find out who’s lying. Every American should be worried about what happened in 2016.



Was this an effort by the Department of Justice and the FBI senior officials to fix an election, to undercut a president who was legitimately elected? If the shoe were on the other foot, we'd be having a lot more attention on this. If this were a Democratic president instead of Trump.



BARTIROMO: So you're committing to getting to the bottom of it through your subpoena power. You're going to get these guys here to testify. And you said the last time you were here that you're going to get all the people who signed on to that warrant, that would include Rod Rosenstein, Sally Yates, who else? Peter Strzok?



GRAHAM: Comey. How could the Department of Justice tell the FISA court that the dossier prepared by Christopher Steele was reliable when they told the president after he got elected, "Here's the dossier, we can't prove any of it, we just want you to know about it?" How could they certify that same document was reliable enough to get a warrant? To this day it is not verified. It was a product produced by a foreign agent, paid for by the Democratic Party. Could you imagine if the Republicans had hired somebody to go to Russia and spy on Hillary Clinton, and they produced a document that was a bunch of garbage? They'd be destroying us as a party.



So yeah, I'm going to get to the bottom of this.



Did they try to invoke the 25th Amendment? Did they lie to the FISA court? Did they open up a counterintelligence investigation against Trump in a sham way? We're going to find out about all of this.



BARTIROMO: You know what keeps getting me, is every time you hear Andrew McCabe talk about this investigation that he launched, and he wanted to make sure would stay in place. You never hear why. And then the 25th Amendment conversation. Well, why? What was the predicate? Do you need a predicate to launch a major investigation into a sitting president?



GRAHAM: A criminal investigation requires probable cause of a crime. A counterintelligence investigation is designed to protect American interests against foreign influence. They told Dianne Feinstein, "Oh, by the way, there may be a Chinese spy on your staff." The counterintelligence investigation against Trump should have been to protect the Trump campaign. Did they ever go to President Trump and tell him about this? No. Two different rules.