"The White House announced the policy to ban lobbyists from advisory committees in a September 2009 blog post by Norm Eisen, who was then serving as the White House ethics czar.
“The president made a commitment to the American people to reduce the influence of lobbyists in Washington out of a belief that lobbyists have too often in the past achieved disproportionate impact on government decisionmakers at the expense of broader voices from the public at large,” Eisen wrote. “If we are going to change the way business is done in Washington, we need to make sure we are not simply continuing the practices of the past.”
Since his 2008 campaign, Obama has often positioned himself against K Street. He has banned lobbyists from contributing to or fundraising for his presidential campaigns and prohibited them from serving in his administration.
The White House did, however, institute a waiver process that allowed several lobbyists to join the administration."