The Filter: April 22, 2008... Pennsylvania Primary Editionhttp://blog.newsweek.com/blogs/stumper/archive/2008/04/22/the-filter-april-22-2008-pennsylvania-primary-edition.aspxA round-up of this morning's must-read stories. IS OBAMA JFK OR ADLAI STEVENSON? (E.J. Dionne, Washington Post) The result of the 2008 election may come down to how voters decide to define Barack Obama. Is he Adlai Stevenson or John F. Kennedy? Is heenCommunityServer 2.1 SP2 (Debug Build: 2.18)