Question: What American former federal prosecutor lost the Republican nomination for the seat in a runoff on July 22, 2014 to Barry Loudermilk? 

Context paragraphs:
Shelley Sekula-Gibbs: Shelley Sekula-Gibbs (born June 22, 1953 in Floresville, Texas) is a physician and a former member of the United States House of Representatives representing  's 22 congressional district from November 13, 2006, until January 3, 2007.  She has also served as a City Councilwoman in Houston, Texas for three terms.  She won the Special Election to fill the 22nd Congressional seat on November 7, 2006, for the remaining weeks of the 109th United States Congress.  On the same day, she also lost in the general election for that seat in the 110th United States Congress.  Thereby she was in the interesting position of being a lame duck the moment she was elected.  In the 2008 campaign for the Republican nomination in the 22nd Congressional District, she finished first in the initial primary, but lost in a runoff to Pete Olson.

Andrew S. Boutros: Andrew S. Boutros is an American lawyer, law professor, and former federal prosecutor best known for prosecuting corporate fraud and cybercrime cases (most notably, Chicago's Silk Road cases).  In 2015, the Federal Law Enforcement Officers Association honored him with the National Prosecutorial Award, and he was also elected to the American Law Institute the same year.  He is currently the National Co-Chair of the White Collar, Internal Investigations and False Claims practice at the law firm, Seyfarth Shaw, where he is resident in the firm's Chicago and DC offices.

William G. Otis: William "Bill" G. Otis (born July 27, 1946) is a law professor and former federal prosecutor who served as Special Counsel to President George H. W. Bush.

Catherine Hanaway: Catherine L. Hanaway (born November 8, 1963) is an American attorney, former federal prosecutor and Republican candidate for Missouri Governor who served as the United States Attorney for the Eastern District of Missouri from 2005 to 2009, and as the first and only female Speaker of the Missouri House of Representatives from 2002 to 2004.

Bob Barr: Robert Laurence Barr Jr. (born November 5, 1948) is an American former federal prosecutor and a former Congressman.

Diane Tebelius: Diane Tebelius is an American attorney and former federal prosecutor, Tebelius was the chair of the Washington State Republican Party from 2006 to 2007.  In 2004, she ran in the Republican primary for election to Washington's 8th congressional district.  In a field of four, she finished second behind popular King County Sheriff Dave Reichert who went on to win the general election.

Irma Elsa Gonzalez: Irma Elsa Gonzalez (born March 29, 1948) is a retired United States federal judge of the United States District Court for the Southern District of California, who was the first Mexican-American female federal judge.  She is married to former federal prosecutor and trial attorney Robert S. Brewer.

Georgia's 11th congressional district: Georgia's 11th congressional district is a congressional district in the U.S. state of Georgia.  The district is currently represented by Republican Barry Loudermilk.  The district's boundaries have been redrawn following the 2010 census, which granted an additional congressional seat to Georgia.  The first election using the new district boundaries (listed below) were the 2012 congressional elections.

David H. Hoffman: David H. Hoffman (born May 22, 1967) is a former federal prosecutor and was Chicago's inspector general.  Hoffman ran for the Illinois seat of the U.S. Senate in 2010 but lost to Alexi Giannoulias in the Democratic primary.

Barry Loudermilk: Barry Dean Loudermilk (born December 22, 1963) is an American politician from the state of Georgia.  He is the U.S. Congressman from Georgia 's 11th congressional district , which covers part of Atlanta's northern suburbs.  Loudermilk won the Republican nomination for the seat in a runoff on July 22, 2014 over Bob Barr, and won the general election on November 4, 2014.  He won reelection to a second term in the U.S. House on November 8, 2016.

Supporting paragraphs: Barry Loudermilk Bob Barr
Answer: Bob Barr