FILE - In this Saturday, June 8, 2013, file photo, Newark Mayor Cory Booker announces his plans to run for the U.S. Senate seat that opened with the death of Frank Lautenberg (D-N.J.) i

 

              FILE - In this Saturday, June 8, 2013, file photo, Newark Mayor Cory Booker announces his plans to run for the U.S. Senate seat that opened with the death of Frank Lautenberg (D-N.J.) i
FILE - In this Saturday, June 8, 2013, file photo, Newark Mayor Cory Booker announces his plans to run for the U.S. Senate seat that opened with the death of Frank Lautenberg (D-N.J.) in Newark, N.J. Booker, 44, is currently serving in his second term as mayor. At right is former Sen. Bill Bradley. (AP Photo/Rich Schultz, File)