President Donald Trump's call to review 24 national monuments established by three former presidents puts in limbo protections on large swaths of land home to ancient cliff dwellings, towering Sequoias, deep, canyons and oceans habitats where seals, whales and sea turtles roam. Trump and other critics say presidents have lost sight of the original purpose of the law created by President Theodore Roosevelt that was designed to protect particular historical or archaeological sites rather than wide expanses.