To announce that there must be no criticism of the president... is morally treasonable to the American public.
— Theodore Roosevelt

The last temptation is the greatest treason: To do the right deed for the wrong reason.
T. S. Eliot treasonable quote

It is not cowardly, quite the contrary, to seek to meet the adversary and know his intentions. However, it is cowardly, shameful and treasonable to lay down arms.
— King Hassan II

Corporations cannot commit treason, or be outlawed or excommunicated, for they have no souls.
— Sir Edward Coke

Ingratitude is treason to mankind.
— treasonable quotation by James Thomson