According to Horowitz, the IRS contends that, by reporting on Hillary Clinton’s national security violations, the tax-exempt foundation effectively endorsed Trump. Nobody likes the IRS, but Americans always assumed that the IRS was an equal opportunity government pest, bedeviling people across the political spectrum. The belief in the agency’s non-partisan status vanished in 2013 when we learned that the IRS had deliberately withheld tax-exempt status from Tea Party organizations, severely hampering their ability to share information during the 2012 presidential election. Now, David Horowitz contends that the IRS is trying to destroy his long tax-exempt Freedom Center, which, among many...