When Guiteau sees Garfield at the train station, he recognizes Blaine and shoots him as well. Blaine survives, and as he didn't do much as secretary of state anyway, butterflies are minimal, until the 1884 election when Blaine's health is bad enough that he doesn't run and Arthur wins renomination unopposed. William Chandler is nominated vice president as a nod to the Half-Breeds, and he and Arthur squeak through in the election, winning 48.66-48.47% the popular vote and doing well enough in the east to win back New York (Arthur's home state) and Connecticut, while the eastern based ticket does just badly enough in Michigan to lose it by a few hundred votes.
The republicans win the electoral vote 211-190, getting Arthur a second term.
The republicans win the electoral vote 211-190, getting Arthur a second term.