The Fox News producer responsible for a chyron that described Joe Biden as a 'wannabe dictator' has resigned, Tucker Carlson said on Thursday.

The former Fox News host made the announcement on his new show, now being broadcast on Twitter.

Carlson did not name the producer, but The Daily Beast reported that he was Alexander McCaskill, who worked with Carlson on Tucker Carlson Tonight for many years. 

The chyron claimed that Biden was a 'wannabe dictator' who was intent on locking up his 2024 rival, Donald Trump. Fox had it on screen for less than 30 seconds, and then apologized.

'On Tuesday afternoon the Biden administration had Donald Trump arrested,' said Carlson on Thursday.

Carlson mocked his former employer for their 'panic' at the wording.

'Those words were up for less than 30 seconds but the effect was immediate,' he said.

'Inside Fox, the women who run the network panicked.

'First they scolded the producer who put the banner on the screen.

'Less than 24 hours after that, he resigned.

'He had been at Fox for more than a decade - he was considered one of the most capable people in the building.

'He offered to stay for the customary two weeks, but Fox told him to clear out his desk immediately.'

Amid widespread criticism of the chyron, Fox said it 'was taken down immediately and was addressed.'