President Trump's administration is shrinking Bears Ears National Monument by up to 92%, and Grand Staircase-Escalante National Monument by half.
It will be the largest reduction of a national monument to date.
The Navajo tribe has vowed to fight the decision in court.
President Donald Trump on Monday will announce the reduction of two national monuments in Utah: Bears Ears and Grand Staircase-Escalante.
Trump plans to shrink the amount of protected land in Bears Ears...