|Colorado House of Representatives District 51|
- Loyola University New Orleans
- University of New Orleans
Shaffer ran in the 2012 election for Colorado House of Representatives District 51. He ran unopposed in the June 26, 2012, Democratic primary. He was defeated by incumbent Brian DelGrosso (R) in the general election on November 6, 2012. 
|Colorado House of Representatives, District 51, General Election, 2012|
|Republican||Brian DelGrosso Incumbent||54.2%||23,760|
|Democratic||Mark R. Shaffer||41.4%||18,165|
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- ↑ Mark Shaffer for House District 51 Facebook page "Info" Accessed October 19, 2012
- ↑ Colorado Secretary of State, - 2012 Primary Candidate List
- ↑ Colorado Secretary of State, Official Primary Election Results