Below is a slightly expanded version of my column in The Hill on the increasingly popular theory that former president Donald Trump is already barred from office under the 14th Amendment. It is a theory that, in my view, has a political appeal that outstrips its constitutional support. In a constitution designed to protect free speech and prevent the concentration of power, this theory would allow for the banning of candidates based on fluid definitions of aiding and abetting insurrection. Such ballot cleansing is common in countries like Iran where citizens await to learn which opposition candidates will be allowed to run. While we are thankfully far from the authoritarianism of these other countries, the implications of this theory for our constitutional system are still chilling….