How did Quinn (the hired gun) know Jack was at the Senator’s house and that they had stumbled on the Sengala - Starckwood (Jon Voight’s company) connection? Did Voight or Quinn just make a great guess that Jack would go to the Senator’s house because of the investigation. I doubt it. That’s a big leap since nothing ever came of the investigation. It seems to imply that there’s still a mole in the FBI. Larry, Renee or Janis? Or could the mole be in the White House? Didn’t Ethan and Chelsea know Jack was headed to the senator’s house?
Oops, Chelsea = Olivia
Remember, Quinn had an FBI radio - that’s how he knew Jack had survived and was on the loose. He would have heard that the FBI was headed to the Senators house to apprehend Jack.