Police searched the suspect's home, "a short distance" from the temple, on Sunday evening, according to a law enforcement source with direct knowledge of the investigation.

CNN: Gunman, six others dead at Wisconsin Sikh temple

"Her lack of fundamental understanding of some key issues was dramatic, " said another McCain source with direct knowledge of the process to prepare Palin after she was picked.

CNN: Palin's off-script comments irk McCain aides

This is a well-known problem and one I wrote about in 2011, with specific reference to Twitter which was at the time a significant source of direct visits.

FORBES: Filling In The 'Direct Visits' Data Hole