The United States will leave the World Health Organization, President Donald Trump said on Monday, saying the global health agency had mishandled the COVID-19 pandemic and other international health crises.

President Donald Trump used one of the executive actions that he issued on his first day back in the White House to begin the process of withdrawing the U.S. from the World Health Organization for the second time in less than five years.

One of President Trump’s first executive orders removes the U.S. from the global health organization, which experts say is “cataclysmic.”