RFK Jr.'s presidential campaign questioned by FEC over payments to daughter-in-law

• Robert F. Kennedy Jr., an independent candidate for president, is being questioned by the Federal Election Commission for payments his campaign made to his daughter-in-law last year.
• The FEC sent Kennedy's campaign a letter on Tuesday, asking for details about "payments to members of the candidate's family" between July 1 and Sept. 30.
• The FEC threatened to take legal action against the Kennedy campaign if the payments to family were for personal use and not campaign services.

Robert F. Kennedy Jr., an independent candidate for president, is being questioned by the Federal Election Commission for payments his campaign made to his daughter-in-law last year, according to a new letter first reviewed by CNBC.

The FEC sent Kennedy's campaign a letter on Tuesday, asking for details about "payments to members of the candidate's family" between July 1 and Sept. 30.

The FEC threatened to take legal action against the Kennedy campaign if the payments to family members did not reflect the fair market value of legitimate campaign services.

Although the letter doesn't name the family member, Kennedy's daughter-in-law, Amaryllis Fox Kennedy, is the only family member who received payments from Robert F. Kennedy Jr.'s campaign for president during the period in question.

Robert F. Kennedy Jr., a son of the late Attorney General Robert F. Kennedy, rose to fresh prominence in recent years as a vaccine skeptic. A lifelong Democrat, Kennedy launched a campaign for president against fellow Democrat Joe Biden last April. In October, he switched to a third-party run.

Polling on Kennedy has varied widely, and it's unclear how serious a threat he poses to Biden's reelection effort. In December, Quinnipiac University released a survey of