Sen. Patrick Leahy (D-Vt.), the figure third in line to the presidency, was taken to the hospital on Thursday evening as a “precaution” and will remain there overnight.

The 82-year-old senator was “not feeling well,” according to his office, and is undergoing tests at a hospital near his home in McLean, Va., just outside of Washington, D.C.

“At the recommendation of his doctors, he is expected to remain overnight for observation,” read a press release from Leahy’s office.

The senator’s staff will provide updates on his health as they see fit.

Leahy was admitted to the hospital earlier this year when he fell and broke his hip, occasioning an emergency surgery. 

During the surgery in June, his office attributed the broken hip to the senator’s blindness in one eye, which has affected his “depth perception” since birth. He was discharged from the hospital five days after the accident.

The eight-term senator announced his impending retirement last year and will be replaced next month with a successor.