Former attorney general William Barr said President Donald Trump’s conduct as a violent mob of his supporters stormed the US Capitol was a “betrayal of his office and supporters”.

US attorney general William Barr, one of Donald Trump’s staunchest allies, is resigning amid lingering tension over the president’s baseless claims of election fraud and the investigation into Joe Biden’s son.

US attorney general William Barr has defended the aggressive federal law enforcement response to civil unrest in America.