Fabrice Coffrini / AFP / Getty WHO Director-General Tedros Adhanom Ghebreyesus defended the organization's response to the COVID-19 after President Donald Trump sent a scathing letter accusing the agency of a series of missteps. In the letter sent to the WHO chief Monday, Trump threatened to permanently halt funding and reconsider US membership to the group unless the WHO made "major substantive changes." The WHO declined to comment on Trump's threat to quit, saying only that it had received his letter and was considering its contents. Visit Business Insider's homepage for more stories. GENEVA (Reuters) - The World Health Organization's head said on Tuesday he would keep leading the global fight against the coronavirus pandemic, after U.S.