Sen. Lindsey Graham (R-S.C.) announced Sunday that the Senate will investigate the Ukraine whistleblower, the Bidens, and FISA warrant abuse following the conclusion of President Donald Trump's impeachment trial.

The whistleblower

Speaking with Fox News host Maria Bartiromo on "Sunday Morning Futures," Graham said the whistleblower should testify before Congress because he wants "to understand how all this crap started."

"The Senate Intel Committee under Richard Burr has told us that we will call the whistleblower," Graham said. "Why is it important? ... If the whistleblower is a former employee, associate of Joe Biden, I think that would be important. If the whistleblower was working with people on [Rep. Adam] Schiff's staff that wanted to take Trump down a year-and-a-half ago, I think that would be important. If the Schiff staff people helped write the complaint, that would be important.

"We're going to get to the bottom of all of this to make sure this never happens again," Graham vowed.



The Bidens

Graham said, "I'm going to bring in State Department officials and ask them, why didn't you do something about the obvious conflict of interests Joe Biden had?"

"I can prove beyond any doubt that Joe Biden's effort in the Ukraine to root out corruption was undercut, because he let his son sit on the board of the most corrupt company in the Ukraine, and we're not going to give him a pass on that," Graham went on to say.

"Eventually, we will get to Hunter Biden. And I want to know why the Obama administration did nothing about this obvious conflict of interest," he continued. "Joe Biden should have given up the Ukrainian portfolio, or Hunter Biden should be taken off the board, because they ruined America's ability to effectively deal with corruption in the Ukraine by having Hunter Biden on the board of Burisma. That's just a fact.

"We're going to get to the bottom of it," Graham vowed.

Graham explained the Senate Foreign Relations Committee would handle the Bidens.

FISA abuse

Graham said, "When it comes to FISA, I'm going to call [Rod] Rosenstein, Sally Yates, [Andrew] McCabe and [James] Comey to find out how a warrant was issued against Carter Page on four different occasions without an adequate foundation and find out how the Department of Justice and the FBI became so out of balance when it came to Trump."

The Senate Judiciary Committee, which Graham chairs, will take the lead on FISA abuse, he explained.