Attorney General Tim Fox, a Republican, announced that he would join the lawsuit in a press conference alongside Republican U.S. Sen. Steve Daines but not Democratic Gov. Steve Bullock.
John Hickenlooper, Cynthia Coffman in Colorado power battle over EPA lawsuit →
"I hope it wasn't a matter of taking eight months just to read the constitution to realize what they had to do under the law," he said.
Attorney general turns over fracking letter info →