On the eve of Oregon’s primary election, a group of Republican candidates and election deniers learned they won’t get to make their case to the U.S. Supreme Court to end Oregon’s mail voting system. 

The high court on Monday declined to hear an appeal from plaintiffs, including state Sen. Dennis Linthicum, the leading Republican candidate for secretary of state, in a case that sought to overturn the method Oregon voters have used to vote in every election for decades.