The FBI currently has 2,700 open investigations of domestic extremism, more than double the usual number of cases, according to counterterrorism officials, underscoring the Biden administration’s accelerated pursuit of what it calls “domestic violent extremists.” The increase in domestic violent extremism described by the Biden administration is shocking, suggesting that the number of plots and racially-motivated killings attributed to white supremacists has also multiplied. So far, the administration has not presented those sorts of numbers. The Department of Homeland Security recorded an average of 1,000 investigations into domestic terrorism plots and incidents per year from 2017 through 2019, including approximately...