Following Caroline Kennedy's scathing letter against cousin Robert F. Kennedy Jr. less than 24 hours before his first confirmation hearing for health and human services secretary, a Kennedy family insider says the Kennedy family is "in tatters" amid the "unprecedented" public conflict — especially considering Caroline almost never speaks publicly.

Shriver shared her support for her cousin, who called Donald Trump's nominee for secretary of Health and Human Services a "predator" in a letter to senators.

The public dispute between Robert F. Kennedy Jr. and Caroline Kennedy has the political family back in the spotlight. Meet key members of the Kennedy family.