McCain AWOL Since April 2008

As of July 7, McCain had missed 61.8 percent of the roll call votes in this Congress, which made him the No. 1 absentee in the Senate (number two was Tim Johnson, who has been recovering from a brain hemorrhage). Obama missed 43.5 percent of the roll call votes.

http://blog.washingtonpost.com/the-trail/2008/07/11/reid_chastises_mccain_for_not.html