A lot of presidents have been assassinated in America. Not one assassination has affected the continuum of government or been more than a personal tragedy.
> Not one assassination has affected the continuum of government or been more than a personal tragedy.
The formerly-enslaved workers in the American South would like a word about Abraham Lincoln's assassination in 1865 and his replacement as president by the (Union-loyal) southerner and states-rights advocate Andrew Johnson, who had very different ideas about Reconstruction and the rights of Blacks. https://en.wikipedia.org/wiki/Andrew_Johnson#Reconstruction
EDIT: Recall as well the 1914 assassination of the Austrian archduke Franz Ferdinand and his wife by a Serbian nationalist: That one murder started the dominos falling for a 30-year, continent-wide war (with a 20-year intermission) in which tens of millions of soldiers and civilians died — with millions of those being systematically murdered. Moreover, that new Thirty Years War (Churchill's term) destroyed the fairly-prosperous international commercial system of the early 1900s; devastated most of Europe's physical- and economic infrastructure; and catapulted Russia and the U.S. to the status of global hegemons.
So yeah: Assassinations can indeed be quite a bit more than just personal tragedies ....