How has the use of television changed the nature of presidential campaigns?

Well, for starters people don't have to actually listen to the radio or go to wherever it's held to to get their compaigns seen and to try and convince people to vote for them!

In 1959, a young senator wrote an article for a young magazine called "TV Guide" trumpeting the potential for the new medium of television to permanently change the way politics worked. In a little more than a year, that same senator, John F. Kennedy, would be elected president of the United States, thanks in no small part to his charismatic performance in a series of televised debates with opponent Richard Nixon and a TV ad campaign that featured some catchy jingles. Three years later, news coverage of Kennedy's assassination would captivate the country, becoming one of the first major tragedies covered by network news [source: Kaid]. By that time, television's place in shaping the political landscape was undeniable.

Fine until slavery ya ya haha