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|U.S. House, Indiana, District 2|
|High school||John Adams High School|
|Bachelor's||United States Military Academy at West Point|
|Service/branch||United States Army|
|Place of birth||South Bend, Indiana|
Mullen was born and raised in South Bend, Indiana.
- John Adams High School
- United States Military Academy at West Point
- United States Army 
Mullen ran in the 2012 election for the U.S. House, representing Indiana's 2nd District. Mullen beat Dan Morrison in the Democratic primary and faced Jackie Walorski (R) and Andrew Straw (G) in the November 6 general election. Mullen lost nine out of ten counties in his primary, but won St. Joseph County, the most populous county in the district.
|U.S. House, Indiana District 2 General Election, 2012|
|Independent||Kenneth R. Lunce, Jr. (Write-in)||0%||3|
|Source: Indiana Secretary of State "House of Representatives Election Results"|
|U.S. House, Indiana, District 2 Democratic Primary, 2012|
Mullen has received endorsements from the Indiana Federation of Teachers,  the organization VoteVets, The American Association for Justice, The Indiana Democratic State Central Committee,  and the Blue Dog Coalition PAC.
- Abortion: "Pro-life"
- Gun Control: "Pro-guns"
The NRCC produced a video to criticize the fact that Mullen allegedly has not lived in Indiana for 16 years and has 3 homes in the Washington DC area.
|U.S. House, Indiana, District 2, 2012 - Brendan Mullen Campaign Contributions|
|Total Raised by Election Winner||$1,878,410|
|Total Spent by Election Winner||$1,878,019|
|Top contributors to Brendan Mullen's campaign committee|
|University of Notre Dame||$19,600|
|Faegre Baker Daniels||$12,050|
|Amalgamated Transit Union||$10,000|
|American Assn for Justice||$10,000|
|American Federation of Teachers||$10,000|
|Top 5 industries that contributed to campaign committee|
|Public Sector Unions||$68,750|
|Building Trade Unions||$62,000|
Mullen and his wife Suzanne have one daughter, Lilly.  Suzanne is a lawyer, working for the Republican party in the US House. She has served as a Minority Counsel and General Counsel on the Transportation & Infrastructure Committee once in the majority in 2011.
- Indiana Secretary of State "2012 Primary Election Results," May 8, 2012
- Politico "2012 Election Map, Indiana"
- Mullen for Indiana "Prospectus" Accessed January 26, 2012
- Judge Bowers had most votes overall; U.S. House hopeful Mullen lost in 9 of 10 counties "Primary" Accessed June 22, 2012
- Brendan Mullen for Congress "Endorsements" Accessed April 13, 2012
- Roll Call "So You Want to be a Political Handicapper, Part 2" "Issues" Accessed June 22, 2012
- NewsMax "GOP's Walorski on Democrat Mullen: 'I Live in the District, He Doesn't'" Accessed June 22, 2012
- Story Time with Brendan "NRCC ad" Accessed June 22, 2012
- OpenSecrets "2012 Election" Accessed March 23, 2013
- Legistorm "Suzanne Mullen" Accessed June 25, 2012
- Almanac of the Unelected "Almanac"