Of the most banal-but-sinister political efforts to enforce ideological orthodoxy in recent years, debanking must rank highly. Quietly, without warning or, often, explanation, Americans and the institutions or businesses they form have been told that their bank accounts are to be closed. A Christian organization engaged in charity work in Uganda, the National Committee for Religious Freedom, investors in cryptocurrencies, businesses in such industries as firearms, payday loans, and credit repair—all these and more have discovered their access to financial...