President Donald Trump is sharply reducing the size of two national monuments in Utah. The move to shrink Bears Ears and Grand Staircase-Escalante national monuments by about 90% unravels protections established by former presidents for areas with unique archaeological and historical features. It comes as Republicans under Trump have sought to drastically reshape the management of vast taxpayer-owned lands concentrated in Western states. Republicans have moved to expand oil and gas drilling, ramp up logging and remove habitat protections for imperiled species. The altered monuments had been designated under the Antiquities Act, a 1906 law meant to preserve important sites. Democrats and conservationists warn of the disposal of treasured landscapes for commercial gain.