Edward J. McCormack Jr.

In the 1962 U.S. Senate special election in Massachusetts, McCormack faced off in the Democratic primary against Edward M. "Ted" Kennedy, who was running for the Senate seat vacated by his brother John upon becoming President of the United States. Critics said the current (appointed) senator, Ben Smith, who was a close friend of the Kennedy family, was intended all along to simply be a "seat-warmer" until Ted Kennedy turned thirty (the minimum age provided by the U.S. Constitution for eligibility to serve in the Senate). Smith initially planned to run in the special election to complete the rest of the term; however, he backed off when polls showed that he would suffer certain defeat to McCormack in the primary.[7] Kennedy faced the notion that with brother John as president and Robert as U.S. Attorney General, "Don't you think that Teddy is one Kennedy too many?".

McCormack had the support of many liberals and intellectuals, who thought Kennedy inexperienced (Kennedy used the slogan, "He can do more for Massachusetts", the same one John had used in his first campaign for the seat ten years earlier). McCormack's staff seems to regard Kennedy's presence in the race more as an insult than a challenge, noting that McCormack had a distinguished record in academics, war service, and public office. By contrast, Kennedy had just reached the qualifying age for the Senate, and his public experience was limited to a short uneventful term as assistant District Attorney in Boston.[1] Kennedy had also been suspended from Harvard University for academic cheating, which he admitted in a press conference, in order to pre-empt McCormack supporters from making an issue of it.

Despite his public service, McCormack was largely seen as the underdog, going up against the fame and fortune of the Kennedy family political machine, which flooded the media with ads promoting Kennedy's Senate candidacy. McCormack's campaign, supervised by his father Edward, Sr., and uncle John W., could afford few radio and newspaper ads, nor a paid staff, and being forced to handle many of the campaign details caused the younger McCormack to lose seven pounds by the end of the contest. Kennedy also proved to be an effective street-level campaigner. What would further hurt McCormack's campaign was his negative attacks which were viewed by voters as overbearing and bullying. McCormack used the slogan, "I back Jack, but Teddy ain't ready", and during the televised debate, he stated, "The office of United States senator should be merited, and not inherited", and said that if his opponent's name was Edward Moore, not Edward Moore Kennedy, his candidacy "would be a joke".[8]

Kennedy subsequently won the September 1962 primary by a two-to-one margin, and he received McCormack's support in the general election. Although pundits predicted that this contest would have caused a rift between McCormack's uncle, John W. McCormack, who was the Speaker of the House of Representatives, and Kennedy's brother President John F. Kennedy, Speaker McCormack never showed by word or deed that he bore a grudge against the Kennedys for his nephew's loss.

In the November special election, Kennedy defeated Republican George Cabot Lodge II, product of another noted Massachusetts political family, gaining 55 percent of the vote.[9]

McCormack was a Massachusetts delegate to the 1964 Democratic national convention.

McCormack was the Democratic nominee for Governor of Massachusetts in 1966, when he lost to Republican incumbent John A. Volpe, the first time that the term of that office was extended from two to four years.