WASHINGTON (AP) — The head of the Food and Drug Administration, Dr. Marty Makary, is resigning after a rocky tenure that drew months of complaints from health industry executives, anti-abortion activists and other allies of President Donald Trump. He steps down after just over a year leading the powerful health regulatory agency, according to a White House official who was not authorized to speak before an announcement expected Tuesday and insisted on anonymity. Makary, a surgeon and health researcher, came to the attention of Republican operatives as an outspoken critic of COVID-19 health measures during the pandemic when he frequently appeared on Fox News. But he struggled to manage the FDA’s bureaucracy and failed to win the confidence of its staff after mass layoffs, leadership changes and a series of controversies in which the agency’s scientific principles appeared to be overridden by political interests, including those of Health Secretary Robert F. Kennedy Jr.…