The Biden administration has a policy against candidates running for federal office to also serve on such boards. The 1939 Hatch Act also limits the political activity of certain federal employees, such as engaging in partisan political campaigns.

So, what does the news all mean? Read on to find out.

First, what does the President’s Council on Sports, Fitness & Nutrition do?

The council has been around in one form or another for more than 60 years, having originally begun as the President’s Council on Youth Fitness in 1956 under then President Dwight D. Eisenhower. Subsequent presidents have championed it — and expanded its mission — in various ways.

President John F. Kennedy was a particularly strong advocate — he even wrote about the national need to address fitness in a “Sports Illustrated” article titled, “The Soft American.” President Lyndon Johnson broadened the council’s agenda to include Americans of all ages — hence, it became the President’s Council on Physical Fitness. Then President Barack Obama saw to it that nutrition became part of the council’s purview — and its name.

Who is on the President’s Council on Sports, Fitness & Nutrition?

The council’s advisory board typically includes prominent athletes and other noteworthy individuals. Past chairs have included everyone from fitness icon (and eventual California governor) Arnold Schwarzenegger to astronaut Jim Lovell (of Apollo 13 fame).

And do they get paid?

Council advisory members are all unpaid volunteers. As the council’s charter states: “The members of the Council shall serve without compensation for their work on the Council. Members of the Council may, however, receive travel expenses, including per diem.”

Why did President Biden ask Walker and Oz to resign?

A White House official told MarketWatch that it’s against President Biden’s policy for candidates vying for federal office to serve on such boards. So Biden asked Walker and Dr. Oz to resign or face termination as of Wednesday.

It’s not necessarily just a Biden rule — there’s a federal law called the Hatch Act that “limits certain political activities of federal employees,” according to the U.S. Office of Special Counsel, such as engaging in partisan political campaigns.

“The law’s purposes are to ensure that federal programs are administered in a nonpartisan fashion, to protect federal employees from political coercion in the workplace, and to ensure that federal employees are advanced based on merit and not based on political affiliation,” the Office of Special Counsel says.

How did Walker and Dr. Oz respond to Biden’s request?

Both indicated they had no intention of resigning, and posted defiant tweets that said as much. Walker said: “I’m not a quitter so you are going to have to fire me.”

Dr. Oz added a video to his tweet and said, “It’s beyond sad that Joe Biden would politicize such an important issue like health.” He also said that the president should be asking Dr. Anthony Fauci to step down. (Dr. Fauci doesn’t serve on the council’s advisory board, so presumably Dr. Oz was referring to Dr. Fauci’s role as director of the National Institute of Allergy and Infectious Disease and as a White House medical advisor.)

A White House official told MarketWatch that since Walker and Dr. Oz didn’t tender their resignations by the Wednesday deadline, they were indeed terminated from their advisory positions.

Is there anyone newly appointed to the council under President Biden?

On Wednesday, Biden announced that José Andrés, the internationally renowned chef and humanitarian, and Elena Delle Donne, a top player in the WNBA, would serve as the council’s co-chairs.