During this time, Minnesota Law & Politics Magazine named Purdon a "Great Plains Super Lawyer" in the practice area of Criminal Defense in 2007 and 2009.

During the 2000 presidential election, Puirdon was a North Dakota state co-chair of GoreNet,[5] a group that supported the Al Gore campaign with a focus on grassroots and online organizing as well as hosting small-dollar donor events.

[6] During the 2008 Democratic presidential primary, Purdon served as North Dakota state chairman for the John Edwards campaign.

In this role, Purdon also represented the Department of Justice in testimony before the United States Senate Committee on Indian Affairs.

In the summer of 2015, Purdon and former US Attorney for South Dakota Brendan Johnson founded Robins Kaplan's American Indian Law and Policy Group.