[3] He has also served in various roles under United States Senator Cory Booker, including as his long-time chief of staff[3] and his 2020 presidential campaign senior advisor.

[4] Klapper served for over a decade as a firefighter and emergency medical technician, including over three years in a full-time capacity, and several more as a volunteer.

[2] The appointment of Klapper received widespread praise with press accounts describing him as a "gregarious personality with credibility across the aisle.

[12] In addition, Senator Cory Booker noted that Klapper has "a fierce view of the need for justice in this world" and went on to call him "Jiminy Cricket" and "one of these rare people that lives with such a high frequency of integrity.

[2] Prior to his service at the Department of Justice, Klapper most recently served for over six years as chief of staff to United States Senator Cory Booker.