July 19, 2020 | 3:08pm

President Trump cast doubt on a new Fox News poll that shows Democratic challenger Joe Biden leading him in the 2020 White House race, blasting the survey as “fake.”

Trump disputed the results presented to him by anchor Chris Wallace — which show Biden up by eight percent — during a wide-ranging interview that aired Sunday.

“First of all, I’m not losing because those are fake polls,” Trump insisted. “They were fake in 2016 and now they’re even more fake.”

The president instead said that he and his re-election campaign have their own polls that have him leading the race.

“We have polls where I’m leading,” he said. “I have a poll where we’re leading in every swing state.”

Trump went on to pan former vice president Biden as “mentally shot.