JFK: Oswald fired at a current Texas Governor and current President.  Bush: al-Zaidi shot at a former Texas Governor who had already checked out as President. 

JFK: Oswald shot from a warehouse and hid in a theater.  Bush: al-Zaidi shopped in a shoe discount warehouse and became famous on TV and YouTube.

JFK: Conspiracy theorists think it was a mob plot.  Bush: Entire Administration was a mob plot.

JFK: Kennedy had a secretary named Lincoln who told him not to go to Dallas. Bush: Ted Kennedy told Bush to return to Baghdad and drive his Lincoln through Sadr City.

JFK: Mystery continues over the grassy knoll.  Bush: Mystery continues over how we re-elected an assy pol.

JFK: Incident spawned legend of Camelot. Bush: Incident cemented legend of SHAM-A-LOT.

JFK: Rendered brain dead by attack. Bush: Remained  brain dead after attack.