I'm sure Obama doesn't want to be remembered for MOST ASSASSINATION ATTEMPTS
I know that if this were the case, it'd piss me off because I couldn't help but dwell on the question "Where were all the people trying to assassinate Bush when he was in charge?" I mean it would have been pretty much the only chance a presidential assassin would get to be famous in a (somewhat) good way.
Of course the circumstances if Bush were to get killed are different. (I'm positive that picking Cheney for the VP slot was the only smart thing Bush ever did.)