US President Donald Trump said he would be “quite disappointed” if his Chinese counterpart Xi Jinping broke a personal promise not to arm Iran, even as he revived his accusation that long-time US health official Anthony Fauci helped shield Beijing from scrutiny over the origins of Covid-19.The comments came as Fauci, who led the US response to the pandemic, appeared before a Senate committee.Separately, Reuters has reported that Iran is expected to receive 300 to 400 Chinese-made...