Joe Lieberman and the Center That Did Not Hold

Joe Lieberman was active in politics right up to the end. The former senator was the founding co-chair of the nonpartisan group No Labels, which is laying the groundwork for a presidential campaign on behalf of a yet-to-be-identified bipartisan “unity ticket.” Lieberman did not live to see whether No Labels will run a candidate. He died on Wednesday at 82 due to complications from a fall. But this last political venture was entirely in keeping with his long career as a self-styled politician of the pragmatic center, which often took...