By Madeline Conway | POLITICO
Two advocacy groups moved on Monday to challenge Donald Trump’s pardon of controversial former Arizona Sheriff Joe Arpaio, alleging that the president’s move was unconstitutional because it undermined the power of the federal judiciary.
A public interest law firm, the Roderick and Solange MacArthur Justice Center, sought to file an amicus brief in an Arizona district court, where Arpaio is seeking to vacate a conviction after Trump granted him a pardon last month. The brief was initially turned down by a judge on procedural grounds.
A second group, the Protect Democracy Project, also filed an amicus brief on Monday arguing that the pardon is unconstitutional.