The president welcomed IndyCar racers and motorsports to the White House, with the first race in the nation’s capital set for August.
Trump called on Henry McMaster to pick Graham’s sister, Darline Graham Nordone, to serve in the interim.
The president announced the surprise address in a Truth Social post Monday.
The Pentagon’s Office of General Counsel will operate the task force and request records, information, and investigations from any department.

California’s lawsuit claims the transaction violates federal anti-trust laws.
The Clarity Act has been stuck in limbo for more than a year.
Educational institutions that do not comply with legal mandates protecting students from sexual misconduct stand to lose federal funding.
Palo Alto Networks CEO Nikesh Arora said AI token efficiency needs to improve by five to eight times in the next 12 months, and 10 times the year after.

The president said God was with him when he was shot by Thomas Crooks at a Pennsylvania campaign rally on July 13, 2024.
South Carolina Gov. Henry McMaster is scheduled to host a press conference at 4 p.m. ET to name his appointment to Graham’s seat.
Notable moments from the past week in America.
Confronting human trafficking is not comfortable, Schott said. ‘There are millions of people that are entrapped in sex slavery.’
In April, U.S. exports of crude oil hit a record 5.6 million barrels per day.
All four had been convicted of ‘serious crimes’ related to the Jan. 6, 2021, breach of the Capitol.
Graham Platner has denied sexual assault accusations against him.
The U.S. president said that the lull in fighting has ended ‘in no uncertain terms.’
The federal agreement requires Dr. Ronald E. McNair Academic High School to drop seat reservations by race or national origin.
The commissioners alleged pro baseball enforced uniform rules unevenly—penalizing Christian expression while allowing Black Lives Matter and LGBT messaging.
Ministers representing more than 60 countries will be invited to attend the counter-terrorism meeting in Washington on July 16.
More than 300 infections have also been recorded in other states.