President Obama’s longtime doctor, David Scheiner, said Tuesday that Hillary Clinton should undergo a “thorough neurological examination” to see if she has lasting damage from a Dec. 2012 concussion she suffered after a fall.

Scheiner also raised numerous questions during an interview with CNN’s Erin Burnett over Donald Trump’s health.

He said that a short letter released by Trump’s doctor, Harold Bornstein, is not sufficient in settling whether the 70-year-old real estate billionaire is in good health. Scheiner, who said he plans to vote for Clinton, wondered what Trump’s body mass index is and said that he appears a “bit overweight.”

Clinton has claimed to be in good health as well. She released a two-page letter from her doctor which addressed her Dec. 2012 fall. Clinton suffered a concussion and a blood clot and was slow to recover.

The doctor’s note stated that Clinton had recovered fully from the concussion and blood clot.

“Is that enough?” Burnett asked Scheiner of the doctor’s note.

“No. A number of questions I have,” he said.

“She’s also 68 years old. While I think that medical letter was well written…it’s not enough,” he added, asserting that Clinton’s doctor’s letter was more thorough than the one from Bornstein.

Scheiner noted that Clinton is on Coumadin, a medication that prevents blood clots.

“You have to monitor that,” he said of the drug. “I’d like to know how well she is being controlled. That’s a difficult drug to use.”

“I think she should have had a…thorough neurological examination in 2016,” he continued.

“We know what happens to football players who have had concussions how they begin to lose some of their cognitive ability.”

Scheiner, who says he plans to vote for Clinton, called on both candidates to release their full medical records. Trump has said he would release his documents if Clinton did as well.

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