Cory Booker (R), Mayor of Newark, New Jersey, laughs during a taped introduction by New York Mayor Michael Bloomberg (L) before sitting down to an interview at the Newseum in Washington, October 2, 2009.

Cory Booker (R), Mayor of Newark, New Jersey, arrives for an interview at the Newseum in Washington October 2, 2009. The interview was part of the First Draft of History event, held by the Atlantic Magazine and the Aspen Institute to bring together newsmakers, historians and journalists.

Getty Images 2 months ago

NEW YORK - SEPTEMBER 10: (L - R) Mayor Cory Booker, Katie Couric, Tyler Perry Ashton Kutcher, Bernadette Peters, Tim Daly, Christine Baranski, Michelle Trachtenberg, and Randy Jackson attend the the 'I Participate' launch with EIF and U.S. Mayors, Celebrities and Volunteers in New Yor...

Getty Images 2 months ago

NEW YORK - SEPTEMBER 10: (L - R) Mayor Cory Booker, Katie Couric, Tyler Perry, and Ashton Kutcher attends the the 'I Participate' launch with EIF and U.S. Mayors, Celebrities and Volunteers in New York City's Times Square to encourage Americans to volunteer at Duffy Square on September...

Getty Images 2 months ago

NEW YORK - SEPTEMBER 10: Caroline Kennedy (3rd-L) and Newark, New Jersey Mayor Cory Booker attend the Entertainment Industry Foundation's volunteer initiatives kick off in Duffy Square on September 10, 2009 in New York City.

Cory Booker, Mayor of Newark, New Jersey, smiles during an interview at the Newseum in Washington October 2, 2009. The interview was part of the First Draft of History event, held by the Atlantic Magazine and the Aspen Institute to bring together newsmakers, historians and journalists.

Cory Booker, Mayor of Newark, New Jersey, sits for an interview at the Newseum in Washington, October 2, 2009. The interview was part of the First Draft of History event, held by the Atlantic Magazine and the Aspen Institute to bring together newsmakers, historians and journalists.

Cory Booker, Mayor of Newark, New Jersey, speaks after being honored with a John F. Kennedy New Frontier Award at the John F. Kennedy School of Government at Harvard University in Cambridge, Massachusetts in this file image from November 24, 2008.

Getty Images 3 months ago

JERSEY CITY, NJ - JULY 24: Cory Booker, Mayor of Newark, NJ (6th-R) attends the funeral for Jersey City Police Detective Marc DiNardo, who was killed in a shootout with a fugitive last week on July 24, 2009 in Jersey City, New Jersey.

AP Photo 9 months ago

Newark Mayor Cory Booker gestures as he ends his State of the City speech with a poem by Maya Angelou at Newark Symphony Hall in Newark, N.J. , Monday, Feb. 9, 2009.

AP Photo 6 days ago

Newark Mayor Cory Booker, left, greets Governor-elect Chris Christie at the Robert Treat Academy charter school, Wednesday, Nov. 4, 2009, in Newark, N.J. , the day after Christie won over incumbent Jon S. Corzine.

Getty Images 1 week ago

NEWARK, NJ - NOVEMBER 1: Newark Mayor Cory Booker (L) shakes hands with U.S. President Barack Obama at a campaign rally for New Jersey Gov. Jon Corzine at the Prudential Center on November 1, 2009 in Newark, New Jersey. Gov.

Getty Images 1 week ago

NEWARK, NJ - NOVEMBER 1: Newark Mayor Cory Booker (L), U.S. Sen Loretta Weinberg (D-NJ) (2L), U.S. President Barack Obama (2R), and New Jersey Gov. Jon Corzine wave to the crowd at a campaign rally at the Prudential Center on November 1, 2009 in Newark, New Jersey. Gov.

U.S. President Barack Obama (2nd R) is joined at a campaign rally for New Jersey Governor Jon Corzine (R), Mayor of Newark Cory Booker (L) and Lieutenant Governor of New Jersey Loretta Weinberg at the Prudential Center in Newark, November 1, 2009.

Getty Images 1 week ago

From left: Newark, New Jersey Mayor Cory Booker , candidate for the New Jersey Lt Governor spot Loretta Weinberg, Us President Barack Obama and New Jersey Governor Jon Corzine wave at a gubernatorial campaign rally November 1, 2009 at the Prudential Center in Newark, New Jersey.

AP Photo 1 week ago

President Barack Obama, New Jersey Gov. Jon Corzine, right, Lt. Gov. Loretta Weinberg, Newark Maryor Cory Booker, left, after a campaign rally in Newark, N.J. , Sunday, Nov. 1, 2009, for New Jersey Gov. Jon Corzine.

AP Photo 1 week ago

President Barack Obama, New Jersey Gov. Jon Corzine, right, Lt. Gov. Loretta Weinberg and Newark Mayor Cory Booker, left, wave after a campaign rally for Corzine in Newark, N.J. , Sunday, Nov. 1, 2009.

AP Photo 1 week ago

Newark Mayor Cory Booker, Sen. Loretta Weinberg and President Barack Obama join New Jersey Gov. Jon Corzine onstage during a campaign rally for incumbent at the Prudential Center in Newark, N.J. , Sunday, Nov. 1, 2009.

AP Photo 2 weeks ago

Newark, NJ, Mayor Cory Booker, right, his driver, left, and a police officer, second from right, talk to three men during a citizen anti-crime caravan on Monday Oct. 26, 2009. For safety and liability reasons, citizen volunteers are not allowed out of their vehicles.

AP Photo 2 weeks ago

Volunteers listen to Newark, NJ, Mayor Cory Booker, center, back to camera, prior to the start of a citizen anti-crime caravan on Monday Oct. 26, 2009.

AP Photo 2 weeks ago

Newark, NJ, Mayor Cory Booker, left, and Public Safety Director Anthony Campos speak to volunteers prior to the start of a citizen anti-crime caravan on Monday Oct. 26, 2009.

Actor Ashton Kutcher shares responses to his tweets on volunteerism to (L-R) Newark, New Jersey Mayor Cory Booker, Katie Couric, and Tyler Perry during the Entertainment Industry Foundation press conference in New York, September 10, 2009.

AP Photo 2 months ago

Actor Ashton Kutcher introduces Newark Mayor Cory Booker during a Entertainment Industry Foundation press conference to encourage volunteerism in major cities around the nation, in New York, on Thursday, Sept. 10, 2009.

AP Photo 5 months ago

FILE - In this March 31, 2009 file photo, Newark, N.J. Mayor Cory Booker gestures during a news conference at city hall in Newark, N.J. Booker and other politicians are blazing a new trail in political discourse as they build huge Internet followings on Twitter's fast-growing social ne...