President Trump on Thursday said his administration was answering “a call to action” by rolling back regulations on environmental protections, health care, financial services and other industries as he made a push to showcase his accomplishments near the end of his first year in office.

Walter M. Shaub Jr., who is resigning as the federal government’s top ethics watchdog on Tuesday, said the Trump administration had flouted or directly challenged long-accepted norms in a way that threatened to undermine the United States’ ethical standards, which have been admired around the world.

President Trump has given at least 16 White House staff members dispensation to work on policy matters they handled while employed as lobbyists or to interact with their former colleagues in private-sector jobs, according to records released late Wednesday. Among those receiving waivers were former lobbyists for the insurance and fossil fuel industries, the White House counsel and key advisers including Reince Priebus.