Guzmán announced her candidacy to triumph the term-confined Paula Sandoval from the Colorado Senate in July 2009. She was the only prospect to be placed on the primary ballot for your seat from the Democratic Party district assembly in April 2010, although state agent Joel Judd announced that he would attempt to create the primary ballot by means of the petition route. When Paula Sandoval was elected to Denver city council in May possibly 2010, Guzmán was the one applicant to run to fill the vacancy. A vacancy committee of precinct committee officers with the Democratic social gathering elected her to fill the vacancy by acclamation. She took the oath of Place of work on Could 21, 2010.