What if invisible and undetectable Alien Space Bats create a magical portal on July 2, 1881 right after Charles Guiteau fires his second bullet at US President James Garfield so that Charles Guiteau's second bullet fatally hits Congressman (in our TL, future US President) William McKinley instead as a result of opening up in a second portal that's located right in front of wherever Congressman McKinley is currently located at that specific point in time? So, before the bullet hits President Garfield, a portal opens up and this bullet flies into it, and then it comes out of another portal that opens up right near Congressman McKinley's location, thus fatally hitting him instead of fatally hitting President Garfield like it did in real life.
What effects would a surviving James Garfield and an 1881 death for William McKinley have on the US during the next several years and decades?
What effects would a surviving James Garfield and an 1881 death for William McKinley have on the US during the next several years and decades?