That would be the purple-shirted members of the SEIU--the Service Employees International Union—who (literally) swung into action outside a town hall meeting in Missouri and became infamous on YouTube and national media. “Town Hall Protestor Roughed Up by SEIU Members” read one headline. The legal system will sort out what happened to David Gladney, the victim of the attack. But public opinion will sort out whether SEIU is sending thugs to town halls. The union “Purps” also turned out in force at President Obama's town hall in New Hampshire. SEIU brought its people in by chartered buses after getting special...