CBS Sunday Morning decided to slip in a rather egregious Cinco de Mayo segment about the Mexican-American War (1846-48), in which most of the Western part of the United States was acquired under the Treaty of Guadalupe Hidalgo. Apparently, the occasion requires a seminar on how Cinco de Mayo is ruined by American imperialism.

CBS reported this was a “wicked” and “forgotten war,” built on presidential lies, and should resonate in the immigration debate -- because Americans don’t know that they’re living on land that was Mexico’s.