Bernie Sanders accused Alan Gross, who was an American prisoner in Cuba for five years, of misremembering their conversation when the 2020 presidential candidate visited him in 2014.

Gross claimed earlier this week that Sanders commended the communist country during their one-hour meeting when he was still imprisoned in the country.

“He said, ‘I don’t know what’s so wrong with this country.’ How could he be so insensitive to make that remark to a political hostage — me!” Gross said the Vermont senator told him.

Sanders, however, denied making such a remark.

“No, I did not. I remember that trip. I remember that trip very well, and I remember the terrible conditions that Mr. Gross lived in. His teeth were rotting. I did not make that statement. Why Mr. Gross is saying that, I have no idea. But I did not make that statement,” he told Fox News Sunday.

The 2020 Democrat visited Cuba as part of a congressional delegation during the Obama administration with Democratic Sens. Heidi Heitkamp of North Dakota and Jon Tester of Montana. Tester told NPR he did not remember the discussion. A source close the Heitkamp said she recalled that an uncomfortable exchange happened but did not remember the exact remark.

Sanders’s comments about Cuba have come under renewed scrutiny, especially after he praised deceased Cuban leader Fidel Castro for the country's high literacy rate.

"We're very opposed to the authoritarian nature of Cuba. But it's unfair to simply say that everything is bad," Sanders told 60 Minutes last month. "When Fidel Castro came into office, you know what he did? He had a massive literacy program. Is that a bad thing, even though Fidel Castro did it?"