NEW YORK, NY - MAY 21: New York (Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg speaks during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

Mayor Michael Bloomberg

Photos of Mayor Michael Bloomberg.

New York City Mayor Michael Bloomberg. (Aug. 26,
(Credit: Getty Images)

New York City Mayor Michael Bloomberg. (Aug. 26, 2013)

NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg speaks during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 21: Mayor Michael
(Credit: Getty Ben Gabbe)

NEW YORK, NY - MAY 21: Mayor Michael Bloomberg attends the 2013 Party In The Garden at the Museum of Modern Art on May 21, 2013 in New York City. (Photo by Ben Gabbe/Getty Images)

ADVERTISEMENT

ADVERTISE HERE
NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg (R) speaks with Muppet character Miss Piggy during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images) *** BESTPIX ***

NEW YORK, NY - MAY 21: (L-R) Puppeteers
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: (L-R) Puppeteers Caroll Spinney, Eric Jacobsen, and New York City mayor Michael R. Bloomberg attend the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg (R) speaks with Muppet character Oscar the Grouch during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg (R) speaks with Muppet character Miss Piggy during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg speaks during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

ADVERTISEMENT

ADVERTISE HERE
NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg speaks during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg speaks during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 21: New York
(Credit: Getty D Dipasupil)

NEW YORK, NY - MAY 21: New York City mayor Michael R. Bloomberg (2nd L) poses with guests during the Museum of the Moving Image and the Jim Henson Legacy collaboration press conference at the Museum of the Moving Image on May 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - MAY 16: The Blue
(Credit: Getty Bennett Raglin)

NEW YORK, NY - MAY 16: The Blue Man Group is New York with New York City Mayor Michael Bloomberg during the Blue Man Group Invades The Knicks Game At Madison Square Garden at Madison Square Garden on May 16, 2013 in New York City. (Photo by Bennett Raglin/Getty Images for Blue Man Group)

NEW YORK, NY - MAY 16: New York
(Credit: Getty Elsa)

NEW YORK, NY - MAY 16: New York City Mayor Michael Bloomberg attends Game Five of the Eastern Conference Semifinals of the 2013 NBA Playoffs between the Indiana Pacers and the New York Knicks at Madison Square Garden on May 16, 2013 in New York City. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Elsa/Getty Images)

ADVERTISEMENT

ADVERTISE HERE
WASHINGTON, DC - APRIL 27: New York Mayor
(Credit: Getty Pool)

WASHINGTON, DC - APRIL 27: New York Mayor Michael Bloomberg talks with actress Barabara Streisand during the White House Correspondents' Association Dinner on April 27, 2013 in Washington, DC. The dinner is an annual event attended by journalists, politicians and celebrities. (Photo by Pete Marovich-Pool/Getty Images)

NEW YORK, NY - APRIL 25: New York
(Credit: Getty Spencer Platt)

NEW YORK, NY - APRIL 25: New York City Mayor Michael Bloomberg (R) speaks during a news conference as Police Commissioner Raymond Kelly listens at City Hall announcing that the two men accused of carrying out last week's bombing of the Boston Marathon planned an additional bomb attack on New York's Times Square on April 25, 2013 in New York City. In interrogations with younger brother Dzhokhar Tsarnaev, police have learned that the two had planned to take the car that they hijacked on April 18, and its driver from Boston and drive to New York with bombs. The plan was apparently foiled after the car ran low on gas and the two brothers engaged in a firefight with police. (Photo by Spencer Platt/Getty Images)

NEW YORK, NY - APRIL 25: New York
(Credit: Getty Spencer Platt)

NEW YORK, NY - APRIL 25: New York City Mayor Michael Bloomberg (L) and Police Commissioner Raymond Kelly enter a news conference at City Hall announcing that the two men accused of carrying out last week's bombing of the Boston Marathon planned an additional bomb attack on New York's Times Square on April 25, 2013 in New York City. In interrogations with younger brother Dzhokhar Tsarnaev, police have learned that the two had planned to take the car that they hijacked on April 18, and its driver from Boston and drive to New York with bombs. The plan was apparently foiled after the car ran low on gas and the two brothers engaged in a firefight with police. (Photo by Spencer Platt/Getty Images)

NEW YORK, NY - APRIL 25: The New
(Credit: Getty D Dipasupil)

NEW YORK, NY - APRIL 25: The New York Times publisher Arthur O. Sulzberger, Jr. (L) and New York City mayor Michael R. Bloomberg attend the 2013 Energy For Tomorrow Conference at The Times Center on April 25, 2013 in New York City. (Photo by D Dipasupil/Getty Images)

NEW YORK, NY - APRIL 24: Michael Bloomberg
(Credit: Getty Laura Cavanaugh)

NEW YORK, NY - APRIL 24: Michael Bloomberg attends the "I'll Eat You Last: A Chat With Sue Mengers" Broadway opening night on April 24, 2013 in New York City. (Photo by Laura Cavanaugh/Getty Images)

ADVERTISEMENT

ADVERTISE HERE
NEW YORK, NY - APRIL 24: (L-R) Gerry
(Credit: Getty Jemal Countess)

NEW YORK, NY - APRIL 24: (L-R) Gerry Byrne, New York City Mayor Michael Bloomberg and Commissioner of the New York City's Mayors Office of Media and Entertainment Catherine Oliver attend Variety's 'New York: Capital Of Content' during the 2013 Tribeca Film Festival on April 24, 2013 in New York City. (Photo by Jemal Countess/Getty Images)

NEW YORK, NY - APRIL 24: New York
(Credit: Getty Andrew H. Walker)

NEW YORK, NY - APRIL 24: New York Mayor Michael Bloomberg and Katherine Oliver attend Capital Of Content Party in partnership with Tribeca on April 24, 2013 in New York City. (Photo by Andrew H. Walker/Getty Images for Variety Magazine)

NEW YORK, NY - APRIL 23: New York
(Credit: Getty John Moore)

NEW YORK, NY - APRIL 23: New York City Mayor Michael Bloomberg greets a counter-terrorism police officer at the Lower Manhattan Security Initiative on April 23, 2013 in New York City. At the counter-terrorism center, police and private security personel monitor more than 4,000 surveillance cameras and license plate readers mounted around the Financial District and surrounding parts of Lower Manhattan. Designed to identify potential threats it is modeled after London's "Ring of Steel" system. (Photo by John Moore/Getty Images)

NEW YORK, NY - APRIL 22: (L-R) Michael
(Credit: Getty Dimitrios Kambouris)

NEW YORK, NY - APRIL 22: (L-R) Michael Bloomberg, Nicholas Baume, Ugo Rondinone, and Frederic Levy attend Nespresso announces premier partnership with "Human Nature by Ugo Rondinone" Exhibit on April 22, 2013 at Rockefeller Center in New York City. (Photo by Dimitrios Kambouris/Getty Images for Nespresso)

NEW YORK, NY - APRIL 22: (L-R) Ugo
(Credit: Getty Dimitrios Kambouris)

NEW YORK, NY - APRIL 22: (L-R) Ugo Rondinone, Michael Bloomberg and Frederic Levy attend Nespresso announces premier partnership with "Human Nature by Ugo Rondinone" Exhibit on April 22, 2013 at Rockefeller Center in New York City. (Photo by Dimitrios Kambouris/Getty Images for Nespresso)

ADVERTISEMENT

ADVERTISE HERE
NEW YORK, NY - APRIL 16: New York
(Credit: Getty John Moore)

NEW YORK, NY - APRIL 16: New York City Mayor Michael Bloomberg (R) and Police Commissioner Ray Kelly address the media at city hall on April 16, 2013 in New York City. Police were out in force throughout New York, a day after expolosions near the finish line of the Boston Marathon killed 3 people and wounded more than 170 more, many of them critically. (Photo by John Moore/Getty Images)

NEW YORK, NY - APRIL 04: Mayor Michael
(Credit: Getty Larry Busacca)

NEW YORK, NY - APRIL 04: Mayor Michael Bloomberg and camper attend SeriousFun Children's Network event honoring Liz Robbins with celebrity guests at Pier Sixty at Chelsea Piers on April 4, 2013 in New York City. (Photo by Larry Busacca/Getty Images for SeriousFun Children's Network)

NEW YORK, NY - APRIL 01: New York
(Credit: Getty Elsa)

NEW YORK, NY - APRIL 01: New York City Mayor Michael Bloomberg attends the game between the New York Yankees and the Boston Red Sox during Opening Day on April 1, 2013 at Yankee Stadium in the Bronx borough of New York City. (Photo by Elsa/Getty Images)

Mayor Michael Bloomberg
(Credit: Mayor Michael Bloomberg (Getty))

Mayor Michael Bloomberg

The person who sent two menacing letters tainted
(Credit: Getty Images)

The person who sent two menacing letters tainted with the poison ricin to Mayor Michael Bloomberg and his gun-control advocacy group may also have sent a similarly worded letter to President Barack Obama, federal officials and a law enforcement source said.

ADVERTISEMENT

ADVERTISE HERE