ANOTHER UPDATE on Senator Tim Johnson (D-SD)

Update II: CNN is reporting that Senator Johnson suffered from "congenital arteriovenous malformation," a condition which causes arteries and veins to grow abnormally large. The condition requires immediate surgery. They are calling his condition critical because anyone who has come out of brain surgery is considered to be in critical condition. As a side note, Thaddaeus Toad suffered from the same when he was 16. He made a speedy and perfect recovery, and is good as new today. Good luck and Godspeed Senator Johnson.

From CNN:

WASHINGTON (CNN) -- Sen. Tim Johnson of South Dakota was in critical condition Thursday after undergoing surgery, a hospital source told The Associated Press.

Johnson had brain surgery early Thursday at George Washington University Hospital after suffering stroke-like symptoms, two Democratic sources familiar with his condition told CNN.

There was no formal announcement of the South Dakota senator's condition, The Associated Press reported, but a person in the hospital's media relations office, who declined to be identified, said the hospital was preparing to announce that Johnson's condition was critical.

Check out this blog for a synopsis from an emergency physician.