Bill Clinton seems a little out of the practice of defending himself, and during a PBS interview on Thursday, looked a little drained.

During questioning by Judy Woodruff, Clinton sat with a slight slump, his face hanging as he chewed on his tongue.

As Bubba attempted to hawk his book with James Patterson, Woodruff wanted to ask about Monica Lewinsky.

“Your relationship with Monica Lewinsky, you said your impeachment was inappropriate, was wrong,” Woodruff said as the camera shot turned to Clinton, who sat with his face hanging and mouth gaping open.

He seemed half asleep, chewing on his tongue as she continued.

“You’ve also said you paid a price, that you left office $16 million or so in debt…”

“That was the least of it,” Clinton interjected, seemingly prepared to make rhetorical amends.

“The price that I paid mostly was the pain I caused to my wife and daughter,” he said.

During a combative interview that aired earlier this week on Today, the former president was seen repeatedly chewing on his tongue as he was forced to listen to a question about his former fling Monica Lewinsky.

Interviewer Craig Melvin asked Clinton about the #MeToo movement, and his scandal with the former White House intern.

As he listened to the question, he sat back with his arms crossed, chewing on his tongue.

It has strangely been a regular occurrence for the former president in recent years.

During a June 2017 appearance with George W. Bush, the 43rd president slouched in his chair, had wild eyes as he spoke and his hand quivered as he held the microphone.

Clinton also appeared to have sores on his lip and face, and during the question, he could be seen chewing on his tongue.

While campaigning in Iowa in early 2016, to rescue Hillary’s floundering presidential campaign, the former president’s hand could be seen trembling while he was making a point.

As he was explaining his wife’s rationale for invoking 9/11 to defend her ties to Wall Street, Clinton said, “She was making the point that the people devastated on 9/11 were people to her, not categories.”

Watch his left hand at the :30 mark:

In 2013, Clinton denied having Parkinson’s.

“I have a condition that sometimes you get with aging,” Clinton said at the time, the Huffington Post reported. “You may have noticed it; my hand has a little tremor when I’m tired and a lot of people do when they’re older.”

“The first time it happened, I had to go get myself checked to make sure I didn’t have Parkinson’s [disease],” he said.

He said his doctor claimed he didn’t though Clinton didn’t say what condition he has.

As Clinton was on the stage in Philadelphia on the eve of the general election, he didn’t look like he was all there.

As both Chelsea Clinton and Michelle Obama spoke, the former president appeared spaced out, frequently chewing on his tongue.

Watch: