The orders could expand oil drilling in the Arctic and Atlantic oceans and upend public lands protections put in place in Utah, Maine and other states.
The Outdoor Industry Association (OIA) issued a statement saying it the outdoor industry business community are "very concerned about and closely watching" President Trump's Executive Order calling for a review of national monument designations under the Antiquities Act.
Trump will sign an executive order authorizing the review Wednesday at the Interior Department, a move that could prompt changes to areas designated not only by former president Barack Obama but also George W. Bush and Bill Clinton.
Speaking about the designation previously, President Obama had said: "I'm designating the Stonewall National Monument as the newest addition to America's National Park System".
President Obama was the most prolific monument designator or any president, creating or expanding 34.
Zinke said he would make a specific recommendation within 45 days on what to do about Bears Ears, which enjoys support from a broad coalition of tribes and environmentalists but is opposed by every elected GOP official in the state. The act was meant to allow the President to identify specific shoals or breeding areas and safeguard them from development, but Obama applied that executive authority to massive stretches of the shelf containing wildly different undersea terrains and habitats.
"Anyone who has read the actual text of the Antiquities Act knows that the law has been greatly abused by recent administrations".
A review of approximately 30 national monuments designated from January 1, 1996 through the end of 2016 that are over 100,000 acres in size.
Should Trump and his administration opt to de-list these sites, they would be going back on some off their promises to both voters and members of Congress who oversaw Zinke's confirmation process.
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It's as important as, if you look at two-way trade, as the United Kingdom and France, and one or two other partners put together. Carr said he will be reconvening the federal-provincial task force on softwood lumber this week to examine additional measures.
"We feel that the public, the people that monuments affect, should be considered and that is why the President is asking for a review of the monuments designated in the last 20 years", Zinke said, adding that he believes the review is "long overdue".
"The storm is getting worse before it gets better", he said.
"With this review, the Trump Administration is walking into a legal, political and moral minefield", said Kate Kelly, public lands director for the Center for American Progress.
If Trump were to strip a national monument of that designation, it would be a first by a president.
Could the "law and order" president, who so often speaks out against protesters, also set his sights on undoing the Stonewall Inn's national monument designation?
The resolutions on Bears Ears and Grand Staircase led the lucrative Outdoor Retailers show to abandon Salt Lake City and look elsewhere for a home.
Environmental groups blasted Trump's action on the western lands. Dozens of the nation's most treasured national parks were first protected as monuments, including Grand Teton, Grand Canyon, Bryce, Zion, Acadia and Olympic national parks.
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