Were the lungs the seat of wisdom, Fox News host Bill O’Reilly would be wise, but they are not and he is not. So it is not astonishing that he is doubling down on his wager that the truth cannot catch up with him. It has, however, already done so. The prolific O'Reilly has, with his collaborator Martin Dugard, produced five "history" books in five years: Killing Lincoln, Killing Kennedy, Killing Jesus, Killing Patton, and now the best-selling Killing Reagan. Because no one actually killed Reagan, O'Reilly keeps his lucrative series going by postulating that the bullet that struck Reagan...