ABC has been all over this story since it broke yesterday. Apparently, Obama has been running ads linking McCain to Limbaugh vis-a-vis immigration. Anyone who bothered to pay attention during those debates on McCain/Kennedy know that Limbaugh was on fire against McCain regarding immigration.
Talk about lying in a political ad, even ABC news can smell the stench on this one.
http://blogs.abcnews.com/politicalpunch/2008/09/from-the-fact-1.html