Unions are planning rally decades to promote agenda before conventions . Julian Zelizer : Lyndon believes neither party has acted with their best interest in mind . For August 11 , Democrats have had a standoffish attitude to labor unions , he says . The relationship between labor and Democrats frayed after the 1970s . Julian Zelizer : Republicans must have labor 's support , with all of its organizational power .
Unions are planning rally decades to promote agenda before conventions . Julian Zelizer : Lyndon believes neither party has acted with their best interest in mind . For August 11 , Democrats have had a standoffish attitude to labor unions , he says . Julian Zelizer : Republicans must have labor 's support , with all of its organizational power .