The Union Police May 12, 2008; Page A14 Unions keep losing membership as a share of the national workforce, which explains why organized labor's main political focus is changing the rules to force more workers into unions. Witness a bill that Senate Democrats are pushing this week to require that hundreds of thousands of local police and firemen submit to collective bargaining. Under current law, every state has the ability to set policies that govern its public workforce. In some states, police, firefighters and paramedics belong to unions that collectively bargain for their contracts. In others, unions representing public-security workers...