FILE - Newark Mayor Cory Booker talks during a news conference outside of the Prudential Center, in this April 4, 2012 file photo taken in Newark, N.J. Mayoral spokeswoman Anne Torres says Booker arrived home Thursday night April 12, 2012 to find the house next door on fire. Booker and two of his security detail entered the home to help its residents escape. Booker went to the hospital to be treated for smoke inhalation, but Torres said he was doing fine. He was expected to be released shortly before midnight. (AP Photo/Julio Cortez, File)
TRENTON, N.J. (AP) -- Newark Mayor Cory Booker has ruled out a bid for New Jersey governor and is eyeing a run for U.S. Senate in 2014.
Booker's announcement Thursday on Twitter ended months of speculation over whether the Democratic Party's biggest draw would seek to challenge Gov. Chris Christie next year.
The Republican governor's approval rating reached an all-time high after Superstorm Sandy.
There's no word on whether Democratic Sen. Frank Lautenberg will retire.
Lautenberg is 88. Booker is 43.
His second term as mayor of the state's biggest city ends in mid-2014.