NEW YORK — New York’s venerable American Museum of Natural History and leading institutions across the country are shutting down major exhibits of Native American artifacts in response to new federal regulations limiting the display of cultural items. Under the guidelines announced recently by the Biden administration, museums must obtain permission from Native American tribes before displaying or performing research on cultural items, many of which were donated generations ago by archaeologists who had stolen them after digging up sacred burial grounds. The policy led the museum to close two …