Joe Kennedy the first in his family to lose a general or primary election in Massachusettes since 1946

"Good elections often get heated," Kennedy said in his concession speech. "Obviously these results are not the ones we were hoping for, but to everyone who fought with us ... I am so proud of what we accomplished."

Kennedy, 39, had been lauded for his aggressive campaigning in 2018 that turned the House to a Democrat majority. And at the beginning of the race last September, it was reported that Kennedy had a double-digit lead over Markey, Brietbart reported.

It appeared Kennedy was unable to justify the reason for why he was challenging Markey—someone reportedly popular among the Bay State's "progressive voter demographic."

President Donald Trump took aim at the Democratic Party, charging the party with shifting too far left to the point where even a Kennedy is no longer welcome.

Kennedy made crucial missteps, one of which was an ad that knocked the "establishment," not realizing that the Kennedy family is perhaps the most established political family in US history.

Though the family's heavy influence in politics has reigned in the US for over 50 years, Kennedy's recent defeat means that he will be out of office altogether in January, as he surrendered his Fourth District seat in the House to campaign for the Senate.

The Boston Globe reported that he is the first Kennedy is 30 consecutive races to ever lose a primary or general election in Massachusetts.

Kennedy was able to reel in the support of the House's highest-ranking member in Pelosi, but it was not enough to right his political campaign that was crumbling. Despite Pelosi's endorsement helping Kennedy raise $100,000, Markey was able to garner $400,000 in just 24 hours, the donations reportedly coming from progressives who were frustrated that Pelosi had the boldness to intervene.

The election itself was very expensive, with Kennedy spending $11.6 million and Market shelling out $8.6 million. The Boston Globe reported that super PACs distributed a staggering $7.9 million between the two candidates.