A string of electoral defeats and the great unpopularity of ObamaCare can't stop Democrats from their self-appointed rendezvous with liberal destiny—ramming a bill through Congress on a narrow partisan vote. What we are about to witness is an extraordinary abuse of traditional Senate rules to pass a bill merely because they think it's good for the rest of us, and because they fear their chance to build a European welfare state may never come again.

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The vehicle is "reconciliation," a parliamentary...