In 1994, Leon Guerrero ran as senator for the 23rd Guam Legislature. In the general election, she placed 9th with 20,168 votes.
24th Guam Legislature
Leon Guerrero ran for reelection to the Guam Legislature in 1996. In the general election, she placed 8th with 20,050 votes.
Ada/Leon Guerrero Gubernatorial Ticket (1998)
In 1998, Leon Guerrero ran as the running mate of Senator Thomas C. Ada in a primary gubernatorial challenge of the incumbent ticket of Governor Carl T.C. Gutierrez and Lieutenant Governor Madeleine Z. Bordallo.
26th Guam Legislature
In 2000, Leon Guerrero ran for a seat in the 26th Guam Legislature. There was no primary election that year, and in the general election, Leon Guerrero placed 5th overall with 18,748 votes.
27th Guam Legislature
In 2002, Leon Guerrero stood for election in the Guam Legislature. She placed fifth in the Democratic primary election with 14,112 votes. In the general election, Leon Guerrero placed fifth with 23,651 votes.
28th Guam Legislature
In 2004, Leon Guerrero ran for re-election. After placing fourth in the Democratic primary election with 7,983 votes, Leon Guerrero garnered 14,853 votes in the general election and placed fourteenth. During this term she authored 27 bills, 9 of which became public laws.
Business career
In 2007, Leon Guerrero was honored as Guam's Small Business Administration's Women in Business Champion. She then attended Pacific Coast Banking School at the University of Washington, graduating from its program in 2009. Succeeding her father and her brother, Leon Guerrero is the Chairwoman of the Board, Chief Executive Officer and President of the Bank of Guam. In August 2011, she was appointed director of the BankGuam Holding Company, and is also a director at Teleguam Holdings, LLC. She is also President of the Guam Women's Chamber of Commerce, and the chairwoman of Guampedia.
Governorship
In February 2017, former senator Leon Guerrero officially announced her bid to be the next Governor of Guam. The Bank of Guam President selected Joshua Tenorio, Vice President of Guam Auto Spot, to be her running mate in the upcoming Democratic primaries. The Leon Guerrero/Tenorio ticket faced-off with 3 other Democratic tickets: the Aguon/Limtiaco ticket, the Gutierrez/Bordallo ticket, and the Rodriguez/Cruz ticket. They emerged victorious with 32% of the primary vote. Leon Guerrero was elected as Guam's first female governor after defeating the Tenorio/Ada Ticket in the general election with 50.7% of the vote.
Personal life
Guerrero married attorney Jeff Cook. She has two children, Joaquin and Mariana.