Senior adviser Ann Lewis scolds Obama on media conference call for stepping up attacks against Clinton instead of talking about "positive ideas" on the issues. Listen to audio here.
Howard Wolfson says he doesn't believe "imitating Ken Starr" is a way to run a nomination campaign.
Plus: Campaign memo echoes theme of the call.In response, Obama spokesman Burton calls Clinton arguments "absurd." Read release here.
Clinton later declines to comment on the invocation of Starr, whose investigation led to her husband's impeachment.
