“Are the Republicans going the way of the Whigs?” During President Donald Trump’s first term, this question was asked a lot. The answer then: No. But one year into his second term it’s worth revisiting the question, not so much because the answer is different this time, but because the question illuminates how much our politics have changed in the past decade. Just in case you forgot — or never knew — the Whigs were one of the two major American parties from the 1830s to the mid-1850s. We’ll return to them in a moment. A decade ago, the conversation...