Although the political system in the United States is republican, its leaders are elected from the two main parties, American families have gained considerable influence, some of which have been popular for decades. Massachusetts lawmaker Joe Kennedy III, a descendant of one of America's most famous political families, is set to announce that he will challenge Senator Edward Markey in the state primary next year. A source familiar with Kennedy's plans said he would officially announce his candidacy in the coming days. The grandson of 38-year-old Robert Kennedy (brother of former President John F. Kennedy) was quietly attending the race by submitting a preliminary dossier to the FEC last month.

Kennedy makes the latest attempt, after a long series of attempts by members of the most famous political family in the United States, to seek election office. John F. Kennedy was the first victim in the family, shot deadly in 1963.

Among them was Joe Kennedy, Joe's father, and his grandfather, Robert Kennedy, who was secretary of justice during his brother John's presidency. Who died in 2009, Congressman Patrick Kennedy II and his aunt Kathleen Kennedy, who served two terms as Maryland's deputy governor.

The Kennedy family is perhaps America's most famous political dynasty. Patrick Joseph Kennedy, the first member of the family to be elected, was elected to the Massachusetts legislature in 1884. Since then, the Kennedy has become a mainstay of American politics. They include the 35-member president, as well as a number of senators, deputies and ambassadors. Forbes estimates that 30 members of the Kennedy family, with a fortune of $ 1.2 billion, combined.

In addition to the Kennedy family, the Bush family is one of two families in American history that have given birth to two presidents, George HW Bush and Son. Bush's father, son of Connecticut Senator Prescott Bush, was a member of Congress, a diplomat, the director of the CIA, and a vice president before he won the presidency in 1988. His eldest son George W. Bush continued to succeed Bill Clinton in 2001. In 2016, Florida's former governor, Jeb Bush, ran for president as well, but eventually lost the Republican primary. While Bush's father and his wife Barbara are worth $ 25 million, the family's combined fortune is about $ 400 million. Currently, Jeb's eldest son (George B.) is a Texas land commissioner, where his father prepares him to be the leader of the fourth generation of Bush politicians.

The Adams family was the first in American history to elect two presidents. John Adams, one of the nation's founding fathers and second president, first served as vice president of George Washington. John Adams, along with his wife and adviser Abigail, raised his son John Quincy Adams, becoming the eighth president of the United States. John Quincy Charles Adams, who served in the Massachusetts House of Representatives, successfully ran the vice-presidential race in 1848, and his son John Quincy Adams II also served in Massachusetts before running unsuccessfully for several times in the 1960s. Currently, the only member of the Adams family still politically integrated is John Donnelly Adams, a Virginia lawyer, who has not succeeded in becoming the state attorney general.

From the Roosevelt family, Theodore and Franklin Roosevelt have served as presidents for 31 years, marking an important stage in American history. Theodore, who assumed the presidency after the assassination of William McKinley, ruled for eight years. The construction of the Panama Canal began, making conservation a priority, and laying a strong foundation for the country's national park system.

His cousin, Franklin Roosevelt, ran for president in 1932, after being governor of New York, and was re-elected three more terms. After his death, many expected his cousin, Eleanor Roosevelt, to complete the political career, but rejected the Democratic nomination for the Senate, instead becoming the first US representative to the United Nations.

Two other Roosevelt members, the sons of Eleanor (James and Franklin), served in the House of Representatives, for example California and New York, respectively, in the mid-20th century. No Roosevelt family has held a political position since then.