Mortensen ran on a platform of exiting Iraq; impeaching President Bush for deceiving the public in making the case for invading Iraq; protecting Social Security, raising or eliminating the income ceiling on Social Security contributions, and introducing an income floor for contributions; providing universal healthcare for all Americans and pressuring pharmaceutical makers to lower prices of prescription drugs; reversing No Child Left Behind and raising funding for student grants and loans; reversing the Patriot Act and protecting privacy rights; and pursuing agreements for fair trade rather than merely free trade.
In his 2005 October Quarterly report to the FEC, Mortensen's campaign committee reported raising $1975.
Mortensen's opponents in the DFL primary race were Elwyn Tinklenberg, a former member of the independent Jesse Ventura's administration with a more conservative platform and Patty Wetterling, the DFL candidate for the Sixth District House race in 2004. Four candidates (Michele Bachmann, Jay Esmay, Jim Knoblach, and Phil Krinkie) ran for the Republican nomination for the seat, which was vacated by Mark Kennedy so he could run for the U.S. Senate. A fifth, Cheri Yecke, dropped out. The Minnesota Sixth District covers the northern suburbs of the Twin Cities and extending northwest to include St. Cloud. Bachmann won the general election.
Mortensen is an Internet auto sales manager and a former assistant minister.