Adler: Long reach of the pardon power

The intriguing President’s Day news that President Abraham Lincoln granted a pardon 160 years ago to President Joe Biden’s great-great-grandfather revived Americans’ fascination with the purpose, concerns, scope and history of this sweeping executive power.

Thanks to the good work of historian David J. Gerleman, we now know that President Lincoln pardoned Moises J. Robinette, a civilian hired as a veterinary surgeon for the Union army, who was court martialed on charges resulting from a brawl on the evening of March 21, 1864. Robinette was found guilty of inciting a “dangerous quarrel,” violat...