 He lost the August 13, 2013, primary to Cory Booker.Booker was subsequently elected to the Senate in 2013, and re-elected in 2014.As Holt's final term in Congress was ending, the American Association for the Advancement of Science (AAAS) announced that he would become its chief executive officer and executive publisher of the "Science" family of journals, succeeding Alan I. Leshner.