Sen. Lindsey Graham Lindsey Olin GrahamSenate Republicans signal openness to working with Biden Loeffler calls for hearing in wake of Netflix's 'Cuties' Quinnipiac poll shows Graham, Harrison tied in South Carolina Senate race MORE says he would be willing to subpoena intelligence agencies to get information related to President Trump's claim that former President Obama wiretapped Trump Tower before the election.

The South Carolina Republican responded "yes" when asked by CNN if he would subpoena for evidence.

"All I can say is that the country needs an answer to this," Graham said.

"The current president has accused the former president of basically wiretapping his campaign."

When asked if he talked with the president about his wiretapping claim, Graham said they discussed Russia.

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"I said Russia's not our friend. They need to pay a price for interfering in our elections," Graham said. "And I think the president gets that the best way to change the world is for America to be strong."

"We request that the Department of Justice provide us copies of any warrant applications and court orders ... related to wiretaps of President Trump, the Trump Campaign, or Trump Tower," the two senators wrote in a letter to Dana Boente, the acting deputy attorney general, and FBI Director James Comey.

The comments come after Trump claimed in a series of tweets early Saturday morning that Obama monitored him at Trump Tower last year.

The president, citing no evidence, questioned whether it was legal for a sitting president to tap "a race for president prior to an election."