The January 6 Capitol clash may be the gift that keeps on giving to cynics everywhere. In the coming months, Americans will likely see jaw-dropping bureaucratic debacles, stunning abuses by federal prosecutors, and appalling bloodlust by angry Biden supporters. Perhaps the least likely outcome is that the coming train wreck will restore faith in American democracy. The Justice Department declared last week, “The investigation and prosecution of the Capitol Breach will be the largest in American history, both in terms of the number of defendants prosecuted and the nature and volume of the evidence.” The feds are sorting through “237,000...