Stephen Colbert said the final days of the presidential campaign are taking a toll on Donald Trump as he limps across the finish line amid scrutiny over his mental acuity.

“He is presenting a very strong case that his brain done broke,” Colbert said.

The former president tried to break out a football metaphor.

But Colbert pointed out that Trump “made a little mouth fumble.”

Trump described his campaign being on the “four-yard line, not the five-yard line, slightly better.”

“All we have to do is carry that ball over that... thing,” Trump said:

Colbert mocked Trump with a football play-by-play in words that Trump might use.

Check it out in his Monday night “Late Show” monologue: