Sen. Ted Cruz’s wipeout in the New York primary, while expected, nevertheless rattled many Republican insiders and activists who did not foresee the magnitude of the defeat. Is Cruz crumbling? Was Wisconsin an anomaly? The Cruz campaign set itself up, sending the candidate to campaign for days in New York and suggesting that Cruz could pick off congressional districts. He didn’t, and worse, came in third. Expectations should have been kept low. Really low. Just as they recovered from New York, anti-Trump Republicans looked up to see a batch of polls from the states that will be voting on April...