“Democratic U.S. Sen. Tim Johnson of South Dakota plans to retire at the end of his term, party officials said Monday — a departure that gives Republicans a prime opportunity to pick up a seat as they attempt to win back control of the chamber in 2014.
Johnson, the chairman of the Senate Banking Committee, suffered a brain hemorrhage in 2006 but later returned to the Senate and won re-election in 2008. He has recovered significantly, though sometimes uses a motorized scooter.
Johnson’s retirement announcement is the fifth by Senate Democrats. Sens. Carl Levin of Michigan, Tom Harkin of Iowa, Jay Rockefeller of West Virginia and Frank Lautenberg of New Jersey also say they won’t run for re-election in 2014. Two Republican senators have also said they plan to retire.