Hillary Clinton
Hillary ClintonReuters

Secretary of State Hillary Clinton, who returned to work Monday after a month-long illness, is expected to testify before the House and Senate committees regarding the terror attack in Benghazi, Libya when both chambers are back in session the week of Jan. 21, sources said Tuesday.

“My sense is, her hearing probably will take place the morning of the 22nd,” the incoming ranking member on the Senate Foreign Relations Committee, Sen. Bob Corker (R-Tenn.), told MSNBC's Andrea Mitchell on Tuesday. Corker said he had had “some very good conversations with her chief of staff” and that Clinton appeared “anxious to want to come up and testify on Benghazi.”

Clinton was scheduled to appear before the House and Senate Foreign Affairs panels last month but sent her deputies instead after falling ill.

Republicans have long been accusing the State Department of failing to adequately implement the necessary security measures at the U.S. mission in Benghazi prior to the Sept. 11 attack, which resulted in the death of Ambassador Christopher Stevens and three other Americans.

State Department spokeswoman Victoria Nuland confirmed during a press briefing that Clinton is expected to appear before both chambers before the confirmation hearing for her controversial replacement, Sen. John Kerry (D-Mass.), takes place.

While Nuland said that no date has been confirmed, she noted that the two chambers wouldn’t be back in session prior to President Obama's Jan. 21 inauguration.

“The goal on our side is we would have the secretary able to testify as she's promised to do while she's still sitting secretary but also have the confirmation hearing as quickly as appropriate after they come back,” she said. “The expectation is that she would be prepared to testify in both the House and the Senate, so we have to work out appropriate timing in both places.”

Clinton was discharged from a New York hospital Wednesday, three days after she was admitted for the treatment of a blood clot in a vein between her skull and brain. Doctors found the clot during a medical test related to a concussion she suffered in December, which she sustained after fainting from dehydration caused by the flu.

She was treated with blood thinners to dissolve the clot, which did not cause a stroke or any neurological damage.