Sen. Johnson in critical, stable condition

U.S. Democratic Sen. Tim Johnson was in critical but stable condition after undergoing brain surgery, a source said on Thursday, reminding Democrats of their precarious hold on the new Senate.

The source familiar with the situation said doctors told Johnson's
family that there was a cluster of blood vessels in the brain that were
bleeding and it was uncertain how long it would take the senator to
recover.

The source quoted hospital officials as telling
Johnson's family and friends that the senator is in "critical but
stable condition."