Olivier Knox, the president of the White House Correspondents' Association joked about Attorney General William Barr's four-page summary of special counsel Robert Mueller's report, saying that he would deliver a whole speech.

“I have some bad news, I’m delivering the whole speech, not just a four page summary of its principal conclusions,” he said during the White House Correspondents' Dinner (WHCD).

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Barr delivered a four page summary of the Mueller report last month before the Justice Department later released a redacted version of the report.

In his summary released last month, Barr said the Mueller report did not find evidence that the Trump campaign conspired with Russia. The attorney general also concluded that there was not enough evidence to pursue an obstruction of justice charge against President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE.

Barr's conclusion has been slammed by Democrats, some of whom are pushing to start impeachment proceedings against Trump.

The Mueller report said it could not concluded whether obstruction of justice had taken place, while also leaving it to Congress to decide.

The annual WHCD event is attended by lawmakers, journalists and celebrities. Trump decided not to attend for the third year in a row and urged officials to do the same.

The president instead attended a campaign rally in Wisconsin.