Of all the questions raised by former special counsel Robert Mueller’s investigation into Russia’s interference in our 2016 elections, none has proven more mystifying and aggravating as to why Robert Mueller ultimately punted the question of whether President Trump committed obstruction of justice to Attorney General William Barr.

Mueller clearly deliberated and decided that not enough evidence existed to charge Trump with any conspiracy charges, yet he explicitly refused to come to a conclusion on the obstruction question. Of all the material benefit to the public brought by Mueller’s hearings with the House Judiciary and Intelligence Committees, the only real question that matters to the public is why.