You can only stop one thing. So things that are wont to happen (Good Presidents getting killed, etc) will tend to happen another way. That said, I wonder if somebody didn't cause Richard Lawrence's gun to jam. Andrew Jackson then proceeded to beat the everliving crap out of Lawrence with his (Jackson's) cane. Hilarity ensued.

I would probably do something that resulted in that. You'd think that I would do something like stop the federal reserve act of 1913 but Andrew Jackson already stopped central banking and it did absolutely nothing.

Andrew Jackson.

The 6 Most Utterly Insane Attempts to Kill a US President | Cracked.com

(#4)

[q]When Jackson attended a funeral in 1835 Lawrence followed, hoping to kill him and presumably tug his mustache and disappear in a cloud of smoke. He approached Jackson from behind, drew a pistol and fired into his back at near point blank range. The gun misfired.

Naturally, being an undead British king warrants carrying two pistols. He quickly drew and fired his second weapon. Same result. By this point others in attendance caught wind of our caped-crusader and wrestled him to the ground. President Jackson served up some justice with his hickory cane before actual legal justice was served. Lawrence was found not guilty by reason of insanity and spent the rest of his life in a mental institution. [/q]