Essentially, from Gore at Columbine to Paul Wellstone's Memorial to the Arizona Shooting Memorial it seems that when liberals gather "memorial services" become political pep rallies.
BloodThirstyLiberal and Michelle Malkin have good takes on this, but let me add a few links.... for comparison.
Video - Ronald Reagan - Challenger Disaster Memorial
Video - George W Bush - Virginia Tech Memorial
Video - VP Al Gore at the Columbine High School Memorial (his speech starts at 1hr, whooping and hollering starts at 1:04) I'll forego his politicizing the tragedy for this blog
Video - The Paul Wellstone campaign rally...errr... "memorial service"
I'll let the videos literally speak for themselves!