This just in from a pool report from the McCain campaign press crew:
"McCain left his office and took the subway to the capitol. He is now in Minority Leader John Boehner's office with Sens. Jon Kyl, Lindsey Graham and Joe Lieberman. [Campaign manager] Rick Davis was on the subway with McCain but I don't know if he went into Boehner's office."
UPDATE: McCain came into the room and was greeted with a standing ovation, lawmakers said. He talked about his desire to be as helpful as he could in passing this legislation."