Former President Donald Trump is not only endorsing ally-turned-rival Nikki Haley’s proposal that presidents 75 and older be required to undergo a mental competency exam, but he’d like to see it apply to candidates of all ages. Trump added that he’d also like to see a mandated physical test.

“ANYBODY running for the Office of President of the United States should agree to take a full & complete Mental Competency Test simultaneously (or before!) with the announcement that he or she is running, & likewise, but to a somewhat lesser extent, agree to a test which would prove that you are physically capable of doing the job,” Trump wrote on Truth Social on Tuesday morning. “Being an outstanding President requires great mental acuity & physical stamina. If you don’t have these qualities or traits, it is likely you won’t succeed. MAGA!”

Trump did not elaborate on what he’d like to see the mental and physical exams entail.

In announcing her candidacy last week, Haley, whom Trump nominated as U.S. ambassador to the United Nations, called for mandatory cognitive tests for all federal elected officials 75 and older — not just presidents.

“In the America I see, the permanent politician will finally retire,” the Republican said during a speech in Columbia, South Carolina. “We’ll have term limits for Congress and mandatory mental competency tests for politicians over 75 years old."

Haley, 51, has said she believes Washington is in need of a new generation of leaders. 

Sixteen U.S. senators and 36 House members are 75 or older, accounting for about one-tenth of Congress. Joe Biden, 80, is the oldest sitting president in U.S. history. And Trump, who is running for the White House again in 2024, is 76.

“America is not past its prime; it’s just that our politicians are past theirs,” Haley said last week.

Republicans, including Trump, have raised questions about Biden’s mental competency since he ran for president in 2020, focusing largely on instances when he’s stumbled over words or names in speeches.

And some Democrats suggested Trump was mentally unfit to serve as president and called on his Cabinet to invoke the 25th Amendment to remove him. Trump has made his own share of speaking gaffes, including forgetting the names of a candidate he endorsed and his own social media app.

In 2020, Trump boasted in a Fox News interview about passing a cognitive test he took two years earlier. That test is designed to detect mild cognitive impairment, such as the onset of dementia.

In one part of the exam, Trump was read five words — person, woman, man, camera, TV —  and then asked to repeat them in order a short while later.

Trump challenged Biden to take the test, but the Democratic candidate refused.

White House press secretary Karine Jean-Pierre said last week that, despite his age, Biden has met the arduous demands of his job and delivered major legislative victories, including packages addressing pandemic recovery, infrastructure, climate change and health care.

“The president always says this, which is watch him,” Jean-Pierre said. “And if you watch him, you'll see that he has a grueling schedule that he keeps up with, that sometimes some of us are not able to keep up with. [At the] State of the Union, I believe he spent 90 minutes speaking to congressional members in front of him, to the American people. After that, he spent an hour shaking hands and saying hello and greeting the congressional members and their guests.”

Biden has said he intends to seek reelection but has not announced a 2024 run.