Seems to have been going on a while then..
I’ve not heard about this before. Before my time 🤔
The two states that swung the election to JFK were Illinois and Texas, Illinois where the Mayor Daley political machine was accused having dead people voting and Texas where LBJ was accused of the same thing
In Nixon’s case he conceded and moved on and ran for Governor of California and lost then ran for President again in 1968 and obviously won this time