Hunter Biden joined his dad on an Air Force One flight to South Carolina Wednesday for a family vacation amid criticism of the FBI’s alleged double standards after agents raided former President Trump’s Mar-a-Lago residence in Florida.

The raid comes amid an ongoing federal investigation in whether Trump took any classified materials from the White House when he left office to his Palm Beach estate.

The younger Biden was photographed with his wife, Melissa Cohen, and his son, Beau, meeting President Biden at Joint Base Andrews in Maryland. The Biden then flew to Kiawah Island, South Carolina for a vacation.

US First Lady Jill Biden waves before boarding Air Force One to depart Joint Base Andrews in Maryland on August 10, 2022. (Nicholas Kamm/AFP via Getty Images)

President Joe Biden walks with his grandson Beau Biden to board Air Force One at Joint Base Andrews in Maryland on August 10, 2022. (Nicholas Kamm/AFP via Getty Images)

President Joe Biden, center, returns a salute as he is joined by, from left, son Hunter Biden, grandson Beau Biden, first lady Jill Biden, obscured, and daughter-in-law Melissa Cohen, as they stand at the top of the steps of Air Force One at Andrews Air Force Base, Md., Wednesday, Aug. 10, 2022. They are heading to South Carolina for a week-long vacation on Kiawah Island. (AP Photo/Susan Walsh)

President Joe Biden, lower right, talks with his son Hunter Biden, lower left, as they walk up the steps with first lady Jill Biden, top left, and daughter-in-law Melissa Cohen, top right, to Air Force One at Andrews Air Force Base, Md., Wednesday, Aug. 10, 2022. They are heading to South Carolina for a week-long vacation on Kiawah Island. (AP Photo/Susan Walsh)

President Joe Biden looks at his grandson Beau Biden as he walks to board Air Force One with his son Hunter Biden at Andrews Air Force Base, Md., Wednesday, Aug. 10, 2022. The President is traveling to Kiawah Island, S.C., for vacation. (AP Photo/Manuel Balce Ceneta)

President Joe Biden walks with his son Hunter Biden and grandson Beau Biden to board Air Force One at Andrews Air Force Base, Md., Wednesday, Aug. 10, 2022. The President is traveling to Kiawah Island, S.C., for vacation. (AP Photo/Manuel Balce Ceneta)

President Joe Biden waves as he boards Air Force One with his son Hunter Biden at Andrews Air Force Base, Md., Wednesday, Aug. 10, 2022. The President is traveling to Kiawah Island, S.C., for vacation. (AP Photo/Manuel Balce Ceneta)

President Joe Biden, center, waves as he is joined by, from left, son Hunter Biden, grandson Beau Biden, first lady Jill Biden, and daughter-in-law Melissa Cohen, as they stand at the top of the steps of Air Force One at Andrews Air Force Base, Md., Wednesday, Aug. 10, 2022. They are heading to South Carolina for a week-long vacation on Kiawah Island. (AP Photo/Susan Walsh)

Their departure comes just two days FBI agents raided Trump's Mar-a-Lago estate. The raid has prompted a flurry of unanswered questions about why the Justice Department under Attorney General Merrick Garland would take such a drastic step.

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Crittics of the raid pointed out what they call a double standard, given that Hunter Biden is himself subject to ongoing federal investigations into his finances and foreign business dealings.

The federal investigation into the first son's tax affairs has reached a "critical stage," a source previously told Fox News. Officials are looking into whether to charge President Biden's son with various tax violations, possible foreign lobbying violations and more.

A separate source told Fox News that the federal grand jury looking into Hunter Biden’s business dealings wrapped up its latest term late last month but said no charges have been filed.

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The investigation is being conducted by Delaware U.S. Attorney David Weiss, a prosecutor appointed by Trump.

Fox News’ Timothy H.J. Nerozzi contributed to this report.

Hunter Biden joins dad Joe for vacation as FBI called out for double standard after Trump Mar-a-Lago raid

Hunter Biden joined his father Joe Biden for a vacation to South Carolina just two days after the FBI raided former President Trump's Mar-a-Lago residence in Florida.