Bears Ears was established by President Obama in 2016, while Grand Staircase-Escalante was established in 1996 by President Clinton.
Interior Secretary Ryan Zinke on Tuesday accused outdoor retailer Patagonia of lying when it said that President Donald Trump "stole your land" by shrinking two national monuments in Utah by some 2 million acres.
A Zinke-led study into national monument declarations says that Trump should shrink OR and California's Cascade-Siskiyou and Nevada's Gold Butte national monuments by small amounts.
Trump commented Monday as he left the White House for a trip to Salt Lake City, where he was outlining his intention to shrink the Bears Ears and the Grand-Staircase Escalante national monuments. That law requires presidents to limit the monument designation to "the smallest area compatible with proper care and management of the objects to be protected".More news: Lobbyist accuses LA assemblyman of sexual assault
Trump said previous presidents overstepped their authority in declaring vast tracts of western lands off-limits, abusing the "purpose, spirit and intent" of a 1906 law known as the Antiquities Act.
Previous presidents have made small reductions to monument boundaries, but never until yesterday had one used the Antiquities Act to so dramatically shrink them.
Zinke said Tuesday he would focus changes in Gold Butte on the site's water districts. "Public lands will once again be for public use, because we know that people who are free to use their land and enjoy their land are the people most determined to conserve their land", he said.More news: Russia's service sector revving up as business activity accelerates
Zinke also has recommended allowing logging at a newly designated monument in ME and urges more grazing, hunting and fishing at two sites in New Mexico. Bears Ears features thousands of Native American artifacts, including ancient cliff dwellings and petroglyphs.
In a statement Monday, NARF said: "President Trump's action to revoke and replace the Bears Ears National Monument is not only an attack on the five sovereign nations with deep ties to the Bears Ears region, it is a complete violation of the separation of powers enshrined in our Constitution". "And the Antiquities Act was never meant to prevent, it was meant to protect". He also calls for a new assessment of border-safety risks at a monument in southern New Mexico.
"Some people think that the natural resources of Utah should be controlled by a small handful of very distant bureaucrats located in Washington".
Outside, protesters held signs saying "Trump a monumental mistake" and "Tiny hands off our lands".More news: Google launches two-wheeler mode in Google Maps for India