Former US President Barack Obama has criticised his successor Donald Trump's handling of the coronavirus crisis. In an online address to graduating college students, he said the pandemic had shown that many officials "aren't even pretending to be in charge". It is the second time in recent days that Mr Obama has hit out at the Trump administration's coronavirus response. He said it had been "an absolute chaotic disaster" during a leaked conference call last week. During his commencement address on Saturday, which was delivered to graduates from several dozen historically black colleges and universities, Mr Obama said the Covid-19 outbreak had exposed failings in the country's leadership. "More than anything this pandemic has fully, finally torn back the curtain on the idea that so many of the folks in charge know what they're doing," he said. "A lot of them aren't even pretending to be in charge," he added. More than 1,200 people have died with coronavirus in the US over the past 24 hours, according to the latest figures from Johns Hopkins University. The total death toll now stands at almost 89,000, which is the highest anywhere in the world.