Some Ukrainians living legally in the US under a Biden-era humanitarian parole program received a notice this week from the Department of Homeland Security telling them to leave the country — a message that prompted panic and later turned out to be erroneous. “It is time for you to leave the United States,” the department wrote Thursday to some Ukrainians in a “notice of termination of parole,” which was obtained by CNN. It added that their parole will expire in seven days and issued a warning: “Do not attempt to remain in the United States — the federal government will...