Who's endorsing whom?

Whether endorsements show strength, reveal the ability to field a successful election-day operation and get people to the polls, or simply make good headlines for campaign ads, candidates sure seem to think they are important.

Here are some of the major endorsements to date in the mayor's race, including labor, political groups and media. We've included membership size and location, plus a description, when available.

Plus, read about the groups that usually do endorse a candidate -- but chose not to in this primary.

Bob Brady

Philadelphia Fire Fighters Union IAFF Local 22. Represents more than 4,000 current and retired fire fighters, paramedics and officers of the Philadelphia Fire Department.

The Philadephia Fraternal Order of Police. Represents 14,500 active and retired Philadelphia police officers.

The School Police Association of Philadelphia

AFSCME District Council 47 Local 810. Comprised mostly of probation and parole officers.

Teamsters Joint Council 53. Represents 60,000 union members in the city and surrounding areas.

Communications Workers of America District 13. Represents 20,000 members employed in
communications and media in the city and surrounding areas.

Philadelphia Building & Construction Trades Council. Represents 70,000 members in the city and surrounding areas.

Southeastern Pennsylvania CAP Council of the United Auto Workers

Lynne Abraham, Philadelphia District Attorney

Democratic City Committee

AFSCME DC 33 Local 488, representing Health Care Workers

AFSCME DC 33 Local 1637, representing Philadelphia Parking Authority, 911 operators, non-uniformed Police and Fire

AFSCME DC 33 Local 159, representing correctional officers

AFSCME DC 33 Local 222, representing Parks and Recreation workers

AFSCME DC 33 Local 1927, representing fleet management workers

AFSCME DC 33 Local 427, representing sanitation workers

AFSCME DC 33 Local 403, representing highways workers

Dwight Evans

Resident Leadership of Public and Assisted Housing, representing people who live in public housing

The Black Clergy of Philadelphia & Vicinity. An influential group of pastors from approximately 450 churches.

United Food and Commercial Workers Local 1776

Transport Workers Union Local 234. Represents more than 5,500 transport workers in Philadelphia and the region..

Laborers’ International Union of North America Local 332. Represents 3,000 members.

The Bakery, Confectionery, Tobacco Workers & Grain Millers International Union AFL-CIO-CLC Local 6. Represents more than 3,300 workers from more than 25 companies in Philadelphia and the region.

Several African-American law enforcement groups, including the Guardian Civic League

A broad group of elected officials including: State Senator Anthony Williams, Senator Leanna Washington, Senator Shirley Kitchen, State Representative Michael McGeehan, Representative Tony Payton, Representative Curtis Thomas, Representative Babette Josephs, Representative William Keller, Representative Harold James, Representative James Roebuck, Representative Ronald Waters, Representative Jewell Williams, Representative Cherelle Parker, Representative John Myers, Representative Mark Cohen, Councilwoman Marian Tasco, Councilwoman Donna Reed Miller, Councilman Juan Ramos, Sheriff John Green, and City Commissioner, Edgar Howard.

Chaka Fattah

May 4: SEIU Local 1201, representing blue-collar employees of the school district

AFSCME D.C.47, whose membership consists of over 3,500 white collar municipal employees who are all taxpayers -- and Philadelphia voters.

The Pentecostal Clergy Political Action Committee, a group that represents over 50 churches with 25,000 members.

The Clergy Coalition, ministers representing over 150,000 congregants.

IATSE Philadelphia Local No 8 Stage Employees

SEIU 32BJ. Represents 5,000 property service workers in Philadelphia and the surrounding area.

Gas Workers Local 686 UWUA. Represents over 2,000 members locally, including retirees.

United Steelworkers Local 404. Represents 1,000 active members and 1,000 retirees.

The "Valiants," the African-American firefighters association

Philadelphia Taxi Owners Association

A group of prominent Chinese community leaders in Chinatown

ACORN’s political action committee

Tom Knox

El Hispano, the bilingual weekly newspaper.

Michael Nutter

The Philadelphia Daily News

The Philadelphia Inquirer

Philadelphia Magazine

City Paper

The Northeast Times

Philly for Change

PhillySkyline.com

Clean Water Action

Southeastern Chapter of Americans for Democratic Action

Penn Dems, which represents more than 2500 students at the University of Pennsylvania

Who sat out?

The Philadelphia Council of the AFL-CIO

The Philadelphia Federation of Teachers