The Box 13 scandal was the Texas Senate election of 1948 won/stolen by Lyndon Johnson. How easy it can be. What’s of interest is that this went to the Supreme Court which ruled that the Federal Government was not allowed to get involved in a state election. Unlike the hanging chad election of 2000 which went to the Supreme Court because it was Federal. At the state level, it’s apparently much easier to commit fraud.
https://en.wikipedia.org/wiki/Box_13_scandal