Sanders slams Clinton's union endorsements

Sen. Bernie Sanders, I-Vt., scoffed at the union endorsements that his Democratic presidential rival Hillary Clinton has gotten, alleging Thursday that the process had not been "democratic," and that had union leaders listened strictly to their rank and file members, he might have won the nods instead.

"Other unions do what they do and that is up to them," Sanders said at the D.C. headquarters of the Communications Workers of America, which backed the senator Thursday. "I don't know what the prospects would have been had there been a democratic poll at those other unions. I think I would have had a good shot."

Clinton has outpaced Sanders in terms of union endorsements so far in the race, gaining the backing of some of the largest powerful ones. They include the Service Employees International Union, the American Federation of State, County and Municipal Employees, the American Teachers Federation, the National Education Association, the Laborers International Union of North America and the International Association of Machinists.

CWA, which boasts 700,000 members, is the largest to endorse Sanders so far. He also has the backing of National Nurses United and the American Postal Workers Union.