Do vice-presidential selections issue?

.SHORTLY AFTER announcing his run for the Autonomous nomination in 1960, John F. Kennedy stated: “I don’t recollect a single case where a vice-presidential applicant supported an electoral vote.” Still, the north-easterner decided on Lyndon Johnson as his running-mate, really hoping that the statesman coming from Texas would aid him in southern states. Johnson tore around the South in a train nicknamed the LBJ Express, getting to rallies in a ten-gallon hat to the pressures of “The Yellow Rose of Texas”.

After he won, Kennedy acknowledged that “our experts couldn’t have actually lugged the South without Johnson”. That Johnson “supplied the South” is now acquired knowledge. But just how much variation perform vice-presidential choices actually create in vote-castings?