WASHINGTON – Anna Burger is leaving her position as head of Change to Win federation. Anna Burger is also retiring as secretary-treasurer of the 2.2-million member Service Employees International Union. Burger’s decision comes three months after she lost a race to succeed Andy Stern as president of the politically influential SEIU. In 2005, Burger and Stern led the SEIU and six other unions to break away from the AFL-CIO — the nation’s largest labor federation — to form the rival Change to Win federation. Burger says she will remain on President Barack Obama‘s Economic Recovery Advisory Board and support a variety of other organizations. She also plans to do consulting work for the SEIU.