Does it matter if a candidate for the US Senate served as a keynote speaker for an extremist group? Does it matter if he hired one of the group's staff to serve on his staff? These are some of the questions being asked about Rep. Joe Sestak as voters learn about his ties to the Council on American-Islamic Relations. ................................................. ...Sestak hired CAIR's director of communications in Philadelphia, Adeeba Al-Zalman, to work in his new Washington office in 2007. Soon thereafter, Al-Zalman had arranged for Sestak to speak at CAIR's Philadelphia dinner that year. ................................................. Joe Sestak's relationship with this...