McMahon served as executive director of the Democratic National Committee from 2005 until 2009.
During his tenure, McMahon was involved in several high-profile decisions and controversies including: conflicts over 2008 Democratic presidential primary debate scheduling[1] and over prominent Democratic complaints about the content of ABC's Path to 9/11 television program.
[2] McMahon was a key player in, and defender of, the DNC's creation of its initially controversial "50 state strategy".
[3] The plan was eventually credited with helping to secure Democratic elections victories in 2006 at both the state and local level.
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