ABC News Can't Spell

In the ABC News article, George's Bottom Line on Clinton for Veep, the author (there's no byline on the article) misspells "principle."

The author writes: "That's the principal they're running on right now."

Yet it should be "principle," not "principal."

This is not a "typo," which is when a person knows the correct spelling but hits the wrong key. This is a misspelling. This is ignorance.