Sen. Lindsey Graham (R-SC) said today he intends to find out the story behind former national security adviser Susan Rice's actions and whether she manipulated classified information for political gain.

According to Fox News' Adam Housley, sources have named Rice as the member of the Obama administration that initiated the unmasking of names of Trump transition officials caught up in surveillance.

The unmasked names were then sent to other top Obama administration national security officials.

Graham said on "America's Newsroom" that lawmakers must "get to the bottom of" what Rice was doing, pointing out her history of "political manipulation of national security information."

He pointed back to Rice and her top deputy, Ben Rhodes, misleading the American people about what happened in Benghazi in 2012 to benefit President Obama politically.

"She's done it in the past. Whether or not she did it this time, I don't know, but it's something Congress should look into," said Graham.

"I'm not going to prejudge here, but I think every American should know whether or not the national security adviser for President Obama was involved in unmasking Trump transition figures for political purposes," he said.

Graham said he has "no idea" if Rice's actions were illegal, but called for former Obama administration officials James Clapper and John Brennan to speak to the Senate.

Graham said he's worried about the ties between President Trump and Russia, along with the leaks of classified information and the new reports about Susan Rice.

"I'm worried about all three," he said.

Watch the full interview above.

UPDATE, 1:00pm ET: In an interview on MSNBC Tuesday, Rice said she asked for the identities of U.S. citizens in intelligence reports, but defended the requests as routine and denied leaking any Trump-related information.

Read more, here.

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