US President Joe Biden caught calling reporter a 'stupid son of a b****' at news conference

The US president's remark was prompted by a question from a Fox News reporter about inflation being a potential political liability in the midterms.

Despite voices in the background being heard saying "no thank you" after the question was put to the president, he responded without realising his microphone was still turned on.

"No, it's a great asset. More inflation. What a stupid son of a b****," the president said.