Past presidents have used the Antiquities Act of 1906—signed into law by Theodore Roosevelt—to protect millions of acres of public land, much of it prime for hunting, fishing, and outdoor recreation, as national monuments. In a call with reporters, Secretary Zinke, who has supported keeping public land in federal control, clarified that the review would only include national monuments designated since 1996—a total of 57. A self-proclaimed "Teddy Roosevelt guy," Zinke also said that his love for public lands would affect the review process. The Antiquities Act, he added, and the monuments it has established have provided the public with a great service. "I'm going to be looking into it and evaluating it on a legal basis," he said. The review "restores the trust between local communities and Washington," he added, and seeks to ensure Americans' voices are heard.