"It is … evident that Americans have not learned the lessons of Russia's attack on our democracy in 2016," Mueller writes in a preface to Interference: The Inside Story of Trump, Russia and the Mueller Investigation by Aaron Zebley, James Quarles and Andrew Goldstein, prosecutors who worked for Mueller from 2017 to 2019.
Mueller continues: "As we detailed in our report, the evidence was clear that the Russian government engaged in multiple, systematic attacks designed to undermine our democracy and favor one candidate over the other."