How did kennedy appeared to many americans during the presidential debate aired on national television in 1960.

At a time when the need for strong leadership was all too obvious, two vastly different candidates vied for the presidency: John F. Kennedy, a young but dynamic Massachusetts senator from a powerful New England family, however Richard Nixon, a seasoned lawmaker who was currently serving as vice president. John F. Kennedy with little more than a single unremarkable term in the U.S. senate under his belt, the 43-year-old Kennedy lacked Nixon’s extensive foreign policy experience and had the disadvantage of being one of the first Catholics to run for president on a major party ticket. 
I provided a little bit of contrast to highlight the differences in the appearance of JFK and Nixon. 
I hope this helps! 

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An elector in the electoral college.