Question: In what capacity did the husband of the art curator and philanthropist based in Louisville Brooke Barzun serve for President Obama's 2012 re-election campaign?

Context paragraphs:
Organizing for Action: Organizing for Action (OFA) is a nonprofit 501(c)4 organization and community organizing project that advocates for the agenda of former U.S. President Barack Obama.  The organization is officially non-partisan, but its agenda and policies are strongly allied with the Democratic Party.  It is the successor of Obama's 2012 re-election campaign and of Organizing for America, which itself succeeded Obama's 2008 campaign.

Stephanie Cutter: Stephanie Cutter (born October 22, 1968) is an American political consultant.  She served as Deputy Campaign Manager for President Barack Obama's 2012 re-election campaign, and has previously worked in campaign and communications roles for other Democrats including Ted Kennedy, John Kerry and Michelle Obama. " The New York Times" described her as "a popular but polarizing face of (Obama's) campaign", and a "soldier who says the things the candidate can’t (or won’t) say."

Noah Mamet: Noah Bryson Mamet (born April 1969) (pronounced muh-MET) is the former United States Ambassador to Argentina under former U.S. President Barack Obama.  He was born in Manhattan Beach, California, and worked as the National Finance Director for House Democratic Leader Richard Gephardt for nine years.  He was a fundraiser for Obama's 2012 re-election campaign and was nominated as Ambassador to Argentina in 2013, which was met with criticism.  His appointment was filibustered by Senate Republicans, which was overcome by Senate Democrats.  He resigned from office with a letter to the President on December 7, 2016, and left office as Ambassador on January 20, 2017.

Matthew Barzun: Matthew Winthrop Barzun (born October 23, 1970) is a former United States Ambassador to the United Kingdom.  He is a business executive who is known for his work with CNET Networks and for his volunteer work on Barack Obama's 2008 presidential campaign.  He served as U.S. Ambassador to Sweden from 2009 to 2011.  He was selected by President Barack Obama as National Finance Chair for the president's 2012 re-election campaign.

Cole Finegan: Cole Finegan is an American lawyer who served as Denver’s City Attorney and Chief of Staff to then Mayor John Hickenlooper from 2003 through 2006.  He is now the Regional Managing Partner of the Americas for Hogan Lovells and Managing Partner of the global legal giant's Denver office.  Finegan also acts as an adviser to Governor Hickenlooper and U.S. Senator Michael Bennet, and serves as Finance Chair for Senator Bennet’s 2016 re-election campaign and was a Co-Chair of Governor Hickenlooper’s re-election campaign.  He was one of only four Colorado Finance Co-Chairs for President Obama’s 2012 re-election campaign.  Finegan was selected as a "Lawyer of the Decade" by "Law Week Colorado"; as Lawyer of the Year 2013; and was also named one of the most influential people in Denver by "5280" magazine ("The 5280 Fifty”).

Devin Dwyer: Devin Patrick Dwyer (born 1982/1983) is an American digital reporter and television journalist.  He covers, among other stories, the White House and the Obama administration for ABC News.  He was the network's off-air reporter on President Obama's re-election campaign in 2012.

Brooke Barzun: Brooke Barzun (born Brooke Lee Brown on June 18, 1972) is an art curator and philanthropist based in Louisville, Kentucky with her husband, Matthew Barzun, the former United States Ambassador to the United Kingdom.  She is the daughter of Owsley Brown II and Christy Brown, and the granddaughter of Sally Brown.  Her extended family has voting control of Brown-Forman Corporation, the parent company of Jack Daniel's whiskey and other brands.

Charlie Gonzalez: Charles Augustine "Charlie" Gonzalez (born May 5, 1945) is a Democratic politician from Texas.  He represented Texas's 20th congressional district in the U.S. House of Representatives from 1999 to 2013.  He served as Chairman of Latinos for Obama and National Co-Chair of President Obama's 2012 re-election campaign.

Priorities USA Action: Priorities USA Action is the largest Democratic Party super PAC.  Founded in 2011, it supported Barack Obama's 2012 re-election campaign.  It was the primary super PAC supporting Hillary Clinton's 2016 presidential campaign.  It focused mainly on high-dollar donors.  As of September 2016, it had amassed $132 million in support of Clinton.  The top six donors to the super PAC have given $43.5 million, which is a third of the money collected by Priorities USA Action in the 2016 election cycle.  The super PAC raised $21.7 million in August 2016, marking its largest monthly fundraising haul.

Jim Messina (political staffer): Jim Messina (born 1969) is a political adviser who was the White House Deputy Chief of Staff for Operations under President Barack Obama from 2009 to 2011 and served as the campaign manager for Obama's successful 2012 re-election campaign.  His "innovative fusion of technology and politics led Google chairman Eric Schmidt to call the 2012 race 'the best-run campaign ever'."  He is currently CEO of The Messina Group.

Supporting paragraphs: Brooke Barzun Matthew Barzun
Answer: National Finance Chair