Dwight D. Eisenhower was the first presidential candidate to use television commercials. Below is one of his commercials, made by Disney, from 1952.

Eisenhower was skeptical about using television and his opponent, Stevenson, wouldn’t appear on television because he thought it demeaning to a man ascending to the presidency. Eisenhower won.
This and campaign commercials since can be found at The Living Room Candidate.