Republican South Carolina Sen. Lindsey Graham announced Thursday that he had requested documents related to communications between former Vice President Biden, Hunter Biden and Ukraine.

“Today, I sent a letter to Secretary of State Mike Pompeo requesting documents related to contacts between: ➡️ Vice President Biden ➡️ Hunter Biden ➡️ other Obama administration officials and Ukrainian President Petro Poroshenko,” Graham tweeted.

Today, I sent a letter to Secretary of State Mike Pompeo requesting documents related to contacts between: ➡️ Vice President Biden

➡️ Hunter Biden

➡️ other Obama administration officials and Ukrainian President Petro Poroshenko. — Lindsey Graham (@LindseyGrahamSC) November 21, 2019

My letter to Secretary Pompeo and the request for information is available online.https://t.co/B4nkjelqjY — Lindsey Graham (@LindseyGrahamSC) November 21, 2019

Today, Chairman @LindseyGrahamSC sent a letter to Secretary of State Mike Pompeo requesting documents related to contacts between Vice President Biden, Hunter Biden, other Obama administration officials and Ukrainian President Petro Poroshenko. MORE: https://t.co/aSw27OMIej — Senate Judiciary (@senjudiciary) November 21, 2019

Graham’s letter detailed requests for records of several phone calls and any communications referencing a 2016 meeting between Hunter Biden, his business partner Devon Archer, and then Secretary of State John Kerry. (RELATED: Lindsey Graham Explains Why He’s Not Playing Along With Impeachment Process)

Graham serves as Chairman of the Senate Judiciary Committee — a role he intends to cede to former Chairman Chuck Grassley in January — and had previously refrained from requesting documents or witnesses related to the House Democrats’ impeachment inquiry, saying that he did not want to give the process any legitimacy.