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CHICAGO — A 19-year-old DePaul University student took on an incumbent alderman backed by the Democratic machine, and lost.

David Krupa knew it would be an uphill battle in the 13th Ward against Ald. Marty Quinn. And he knew his chances were slim.

Krupa told WGN he believes he started a powerful movement, and will continue to be an agent for change.

The political science major said he was bullied and threatened by people associated with Quinn and Speaker Mike Madigan, who hand-picked Quinn for the job. Krupa filed a federal lawsuit claiming Quinn and Madigan committed election fraud, filing thousands of false statements with the board of elections. Krupa says Quinn’s people got residents to remove names on his ballot petition, but they gathered 1,000 more signatures than he actually go, which is where the alleged fraud comes in.

Quinn denied the allegations.

Quinn released the following statement:

“I’m honored and humbled to have the opportunity to continue serving the residents of the 13th Ward. Their goals are my goals and together we will continue making the 13th Ward one of the best neighborhoods to live and raise a family. I thank the voters for this privilege.”

Madigan also released a statement:

“Ald. Marty Quinn has built a shared vision with the residents of the 13th Ward to make the neighborhood a strong and vibrant place to live, work and raise our families. The voters spoke loud and clear and chose the candidate with integrity and dedication to the 13th Ward.”