Why does the GOP have a problem with immigration?

The pundits claim that one reason Eric Cantor lost in his conservative Virginia safe haven was that his opponent is more anti-immigration reform and the voters there loved that. How do we explain the GOP-dominated House’s problems associated with reforming immigration? The Virginia results give the answer, at least in that district: GOP voters hate immigrants.

That answer is too simple, though, so we must probe deeper into the dark corners of GOP leaders’ thoughts. They pander to their constit...