ROBERT MUELLER’S BELTWAY COVER-UP By using the justice system as a political weapon, Mueller and his supporters in both parties are confirming what many Americans already believe: We are not all equal under one law. Past and present FBI officials who broke the law may be seen to have the largest stake in Mueller’s investigation continuing as long as possible. The inquiry has plenty of other constituencies as well. National security hawks are rightly worried that the abuses of foreign intelligence surveillance may jeopardize programs that are designed to keep Americans safe from terrorism. For the time being, Mueller’s probe...