Senator Frank Lautenberg of New Jersey has finally decided to retire:

Mr. Lautenberg, at 89 the oldest member of the Senate and its only remaining veteran of World War II, told his staff of his decision and was to announce it formally on Friday in Paterson, N.J., where he grew up the son of poor immigrant parents.

Well before this announcement, Newark Mayor Corey Booker had declared he was running for Lautenberg's seat (whether Lautenberg retired or not). Get ready for Senator Booker.