Newark Mayor Cory Booker (D) confirmed to BuzzFeed that he would not make his bid for U.S. Senate official until after the New Jersey gubernatorial race this fall.
"Although Booker has since started to campaign -- he filed paperwork with the Federal Election Committee in January, and he is headed later this month to a fundraiser in Florida in support of his Senate bid -- he has declined to say definitively that he will be a Senate candidate, despite a universal acknowledgement that his candidacy is all but certain."