A Fulton County grand jury has indicted former president Donald Trump over his efforts to subvert the 2020 presidential election in Georgia, and District Attorney Fani Willis is well within her legal rights to bring the case under state law. Whether that prosecution is advisable, in the wake of federal charges arising out of the same conduct, is a tougher call — one about which I have substantial misgivings. …

But there is a concern about piling on here. Why stop at Georgia? The federal indictment sets out conduct in six other states in which Trump and his co-conspirators allegedly sought to overturn the election results. Will he be prosecuted in those states, too? At some point, it becomes unfair — yes, even to Trump — to go state by state. That’s why the federal approach is preferable.