Trump mocks Biden’s autopen use while showing Xi presidential portraits

US President Donald Trump took a swipe at former President Joe Biden during Chinese President Xi Jinping's visit to the White House, joking about Biden's use of an autopen while showing Xi a display of presidential portraits.Trump and Xi were walking through the White House colonnade on Thursday when Trump stopped at the Presidential Walk of Fame, a row of portraits of former US presidents.Pointing to portraits representing his two terms in office, Trump told Xi, "Trump, and then Trump," before gesturing towards the space representing Biden."And, this is the autopen," Trump said, prompting Xi to laugh."It's Biden," Trump added, tapping Xi on the arm.Biden represented by autopenBiden is the only former president whose portrait is not displayed alongside the other commanders-in-chief in the row.