A reader writes:

The junior senator from the Palmetto State forgets his own state history. One hundred and fifty years ago, on Dec. 20, 1860, a gaggle of South Carolinians in convention assembled declared the state's secession from the Union. And four days later, on Christmas Eve, they published their legal defense of the move. That defense placed the entire blame on the North's hostility to slavery, which, it said, had been reinforced by "erroneous religious belief."

They have always been very, very sure of themselves down there in South Carolina.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.