Going back to Kindergarten

I've been struggling all morning with the "Dormant" Commerce Clause in preparation for my Con Law exam Friday. I was staring at the page for what seemed like an eternity. My inner voice was screaming (I'm in a no-talking study room, so I couldn't actually scream), "Why cant I make sense of this?" Then I realized my book was upside down.

It's been a long week.

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to be continued...