Newark Mayor Booker files papers to run for Senate from Reuters: Politics (Reuters) - Cory Booker, the New Jersey mayor who is a rising star in the Democratic party, filed documents on Friday revealing his intention to run for the U.S. Senate in 2014, possibly setting up a primary challenge against 88-year-old Democratic incumbent Frank Lautenberg feeds.reuters.com/~r/Reuters/PoliticsNews/~3/60KnjjvyaPo/us-usa-politics-newjersey-idUSBRE90A18M20130111