A federal judge has blocked the Trump administration’s attempt to ease rules on mining, drilling and grazing across millions of acres in seven U.S. Western states, including Nevada. At least temporarily. Judge B. Lynn Winmill said changes adopted by the administration would cause further declines in populations of greater sage grouse. The bird is at the center of a conflict between the administration and conservationists about how much public lands should be opened to development. The ruling covers public land in Idaho, Wyoming, Colorado, Utah, Nevada, California and Oregon.