Michele Bachmann has released a letter from the Attending Physician of the U.S. Congress saying that although she suffers from migraine headaches, her brain scans were "normal." Bachmann's presidential campaign is responding to a report, posted Tuesday by The Daily Caller, that she is sometimes incapacitated by the headaches and takes a lot of pills to control them. Rival Republican candidate Tim Pawlenty took a veiled swipe at Bachmann Wednesday, saying, "All of the candidates I think are going to have to be able to demonstrate they can do all of the job all of the time."

National Journal posts the doctor's letter: